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.infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox biography vcard"><tbody><tr><th colspan="2" class="infobox-above" style="font-size:125%;"><div class="fn">Kenneth Vivian Thimann</div></th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Kenneth_V._Thimann.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Kenneth_V._Thimann.jpg/220px-Kenneth_V._Thimann.jpg" decoding="async" width="220" height="256" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Kenneth_V._Thimann.jpg/330px-Kenneth_V._Thimann.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Kenneth_V._Thimann.jpg/440px-Kenneth_V._Thimann.jpg 2x" data-file-width="450" data-file-height="524" /></a></span></td></tr><tr><th scope="row" class="infobox-label">Born</th><td class="infobox-data">August 5, 1904<br /><div style="display:inline" class="birthplace">Ashford, Kent, England</div></td></tr><tr><th scope="row" class="infobox-label">Died</th><td class="infobox-data">January 15, 1997<br /><div style="display:inline" class="deathplace">Haverford, Pennsylvania, United States</div></td></tr><tr><th scope="row" class="infobox-label">Monuments</th><td class="infobox-data">Thimann Laboratories, University of California at Santa Cruz</td></tr><tr><th scope="row" class="infobox-label">Spouse(s)</th><td class="infobox-data">Ann Mary Thimann, nee Augusta Mary Bateman (b.4/20/1905 d.1987)</td></tr><tr><th scope="row" class="infobox-label">Children</th><td class="infobox-data">Vivianne T. Nachmias, Karen T. Romer, Linda T. Dewing</td></tr><tr><th scope="row" class="infobox-label">Parents</th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li>Israel Phoebus Thimann (father)</li><li>Muriel Kate Harding Thimann (founder of the <a href="/wiki/Ashford_School" title="Ashford School">Ashford School</a>) (mother)</li></ul></div></td></tr><tr><th scope="row" class="infobox-label">Relatives</th><td class="infobox-data">Siblings: Ralph Thimann, <a href="/wiki/Eric_Thiman" title="Eric Thiman">Eric Thiman</a>, and Ivor Cedric Thimann</td></tr></tbody></table> <p><b>Kenneth Vivian Thimann</b> (August 5, 1904 – January 15, 1997) was an English-American <a href="/wiki/Plant_physiologist" class="mw-redirect" title="Plant physiologist">plant physiologist</a> and <a href="/wiki/Microbiologist" title="Microbiologist">microbiologist</a> known for his studies of <a href="/wiki/Plant_hormones" class="mw-redirect" title="Plant hormones">plant hormones</a>, which were widely influential in <a href="/wiki/Agriculture" title="Agriculture">agriculture</a> and <a href="/wiki/Horticulture" title="Horticulture">horticulture</a>. He isolated and determined the structure of <a href="/wiki/Auxin" title="Auxin">auxin</a>, the first known plant hormone. He spent most of his early career (1935–1965) at <a href="/wiki/Harvard_University" title="Harvard University">Harvard University</a>, and his later career (1965 - 1989) at the <a href="/wiki/University_of_California,_Santa_Cruz" title="University of California, Santa Cruz">University of California, Santa Cruz</a>.<sup id="cite_ref-Daniel_1-0" class="reference"><a href="#cite_note-Daniel-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> He is credited with identifying <a href="/wiki/Indole-3-acetic_acid" title="Indole-3-acetic acid">indole-3-acetic acid</a> as an <a href="/wiki/Auxin" title="Auxin">auxin</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Thimann was born in <a href="/wiki/Ashford,_Kent" title="Ashford, Kent">Ashford</a>, England. He studied chemistry and biochemistry at <a href="/wiki/Imperial_College,_University_of_London" class="mw-redirect" title="Imperial College, University of London">Imperial College, University of London</a> (earning a B.Sc. and a Ph.D.) and also received a diploma from the <a href="/wiki/University_of_Graz" title="University of Graz">University of Graz</a>. After several years teaching at the University of London, Thimann moved to the <a href="/wiki/California_Institute_of_Technology" title="California Institute of Technology">California Institute of Technology</a> in 1930. In 1935, he joined the Biology department of <a href="/wiki/Harvard_University" title="Harvard University">Harvard University</a>. He authored an influential book on plant hormones, <i>Phytohormones</i>, in 1937 (co-authored with <a href="/wiki/Frits_Warmolt_Went" title="Frits Warmolt Went">F. W. Went</a>). He was elected to the <a href="/wiki/American_Academy_of_Arts_and_Sciences" title="American Academy of Arts and Sciences">American Academy of Arts and Sciences</a> in 1938.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Thimann became director of Harvard's Biological Laboratories in 1946, a position he held until 1950. He was elected to the United States <a href="/wiki/National_Academy_of_Sciences" title="National Academy of Sciences">National Academy of Sciences</a> in 1948.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> In 1955 he wrote <i>The Life of Bacteria</i>, an influential book on microbiology. He was elected to the <a href="/wiki/American_Philosophical_Society" title="American Philosophical Society">American Philosophical Society</a> in 1959.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> From 1962 until leaving Harvard in 1965, Thimann was the Higgins Professor of Biology.<sup id="cite_ref-Daniel_1-1" class="reference"><a href="#cite_note-Daniel-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Thimann moved to University of California, Santa Cruz (UCSC) in 1965—the year of its founding—to become the first <a href="/wiki/Provost_(education)" title="Provost (education)">provost</a> of <a href="/wiki/Crown_College,_University_of_California,_Santa_Cruz" title="Crown College, University of California, Santa Cruz">Crown College</a>. At UCSC, he was largely responsible for building the science departments of the new university. He also played a central role in fostering the <a href="/wiki/UCSC_Arboretum" class="mw-redirect" title="UCSC Arboretum">UCSC Arboretum</a> and its botanical collection. After retiring as provost in 1972, Thimann remained at UCSC until 1989, when he moved to <a href="/wiki/Haverford,_Pennsylvania" title="Haverford, Pennsylvania">Haverford, Pennsylvania</a>. In 1977, he wrote <i>Hormone Action in the Whole Life of Plants</i>. He won the <a href="/wiki/Balzan_Prize" title="Balzan Prize">Balzan Prize</a> in 1982 in recognition of his contributions to botany.<sup id="cite_ref-Daniel_1-2" class="reference"><a href="#cite_note-Daniel-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Notes_and_references">Notes and references</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kenneth_V._Thimann&action=edit&section=1" title="Edit section: Notes and references"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Daniel-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-Daniel_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Daniel_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Daniel_1-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text">Charles Daniel, "<a rel="nofollow" class="external text" href="http://content.cdlib.org/xtf/view?docId=hb7t1nb4v2&doc.view=frames&chunk.id=div00066&toc.depth=1&toc.id=">Kenneth V. Thimann, Biology: Santa Cruz</a>", <i>University of California: In Memoriam, 1997</i>, edited by David Krogh. Academic Senate, University of California, 1997, pp. 163-165. Accessed March 5, 2009.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFThimann1936" class="citation journal cs1">Thimann, Kenneth V. (1936). "Auxins and the Growth of Roots". <i>American Journal of Botany</i>. <b>23</b> (8): 561–569. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.2307%2F2436087">10.2307/2436087</a>. <a href="/wiki/JSTOR_(identifier)" class="mw-redirect" title="JSTOR (identifier)">JSTOR</a> <a rel="nofollow" class="external text" href="https://www.jstor.org/stable/2436087">2436087</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=American+Journal+of+Botany&rft.atitle=Auxins+and+the+Growth+of+Roots&rft.volume=23&rft.issue=8&rft.pages=561-569&rft.date=1936&rft_id=info%3Adoi%2F10.2307%2F2436087&rft_id=https%3A%2F%2Fwww.jstor.org%2Fstable%2F2436087%23id-name%3DJSTOR&rft.aulast=Thimann&rft.aufirst=Kenneth+V.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AKenneth+V.+Thimann" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.amacad.org/person/kenneth-vivian-thimann">"Kenneth Vivian Thimann"</a>. <i>American Academy of Arts & Sciences</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-12-07</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=American+Academy+of+Arts+%26+Sciences&rft.atitle=Kenneth+Vivian+Thimann&rft_id=https%3A%2F%2Fwww.amacad.org%2Fperson%2Fkenneth-vivian-thimann&rfr_id=info%3Asid%2Fen.wikipedia.org%3AKenneth+V.+Thimann" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.nasonline.org/member-directory/deceased-members/49794.html">"Kenneth V. Thimann"</a>. <i>www.nasonline.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-12-07</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.nasonline.org&rft.atitle=Kenneth+V.+Thimann&rft_id=http%3A%2F%2Fwww.nasonline.org%2Fmember-directory%2Fdeceased-members%2F49794.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AKenneth+V.+Thimann" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://search.amphilsoc.org/memhist/search?creator=Kenneth+V.+Thimann&title=&subject=&subdiv=&mem=&year=&year-max=&dead=&keyword=&smode=advanced">"APS Member History"</a>. <i>search.amphilsoc.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2022-12-07</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=search.amphilsoc.org&rft.atitle=APS+Member+History&rft_id=https%3A%2F%2Fsearch.amphilsoc.org%2Fmemhist%2Fsearch%3Fcreator%3DKenneth%2BV.%2BThimann%26title%3D%26subject%3D%26subdiv%3D%26mem%3D%26year%3D%26year-max%3D%26dead%3D%26keyword%3D%26smode%3Dadvanced&rfr_id=info%3Asid%2Fen.wikipedia.org%3AKenneth+V.+Thimann" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kenneth_V._Thimann&action=edit&section=2" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://library.ucsc.edu/reg-hist/thimann">Kenneth V. Thimann: Early UCSC History and the Founding of Crown College</a> - posthumous memoir by Randall Jarrell based on interviews with Thimann and his colleagues</li> <li><a rel="nofollow" class="external text" href="http://www.oac.cdlib.org/findaid/ark:/13030/tf5q2nb4fk/">Guide to the Kenneth V. Thimann papers UC Santa Cruz Library</a></li> <li><a rel="nofollow" class="external text" href="https://digitalcollections.library.ucsc.edu/catalog?f%5BsubjectName_sim%5D%5B%5D=Thimann%2C+Kenneth+Vivian%2C+1904-1997&locale=en&q=kenneth&search_field=all_fields">Photographs of Kenneth V. Thimann from the UC Santa Cruz Library's Digital Collections</a></li> <li><a rel="nofollow" class="external text" href="https://video.ibm.com/recorded/74567474">Remembering Kenneth and Ann Thimann</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist 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mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini 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href="/wiki/Nathaniel_Lord_Britton" title="Nathaniel Lord Britton">Nathaniel Lord Britton</a> (1897)</li> <li><a href="/wiki/Lucien_Marcus_Underwood" title="Lucien Marcus Underwood">Lucien Marcus Underwood</a> (1898)</li> <li><a href="/wiki/Benjamin_Lincoln_Robinson" title="Benjamin Lincoln Robinson">Benjamin Lincoln Robinson</a> (1899)</li> <li><a href="/wiki/Byron_Halsted" title="Byron Halsted">Byron Halsted</a> (1900)</li> <li><a href="/wiki/Joseph_Charles_Arthur" title="Joseph Charles Arthur">Joseph Charles Arthur</a> (1901)</li> <li><a href="/wiki/Beverly_Thomas_Galloway" title="Beverly Thomas Galloway">Beverly Thomas Galloway</a> (1902)</li> <li><a href="/wiki/Charles_Reid_Barnes" title="Charles Reid Barnes">Charles Reid Barnes</a> (1903)</li> <li><a href="/wiki/Robert_Almer_Harper" title="Robert Almer Harper">Robert Almer Harper</a> (1904)</li> <li><a href="/wiki/William_Ashbrook_Kellerman" title="William Ashbrook Kellerman">William Ashbrook Kellerman</a> (1905)</li> <li><a href="/wiki/Franklin_Sumner_Earle" title="Franklin Sumner Earle">Franklin Sumner Earle</a> (1906)</li> <li><a href="/wiki/George_Francis_Atkinson" title="George Francis Atkinson">George Francis Atkinson</a> (1907)</li> <li><a href="/wiki/William_Francis_Ganong" title="William Francis Ganong">William Francis Ganong</a> (1908)</li> <li><a href="/wiki/Roland_Thaxter" title="Roland Thaxter">Roland Thaxter</a> (1909)</li> <li><a href="/wiki/Erwin_Frink_Smith" title="Erwin Frink Smith">Erwin Frink Smith</a> (1910)</li> <li><a href="/wiki/William_Gilson_Farlow" title="William Gilson Farlow">William Gilson Farlow</a> (1911)</li> <li><a href="/wiki/Lewis_Ralph_Jones" title="Lewis Ralph Jones">Lewis Ralph Jones</a> (1912)</li> <li><a href="/wiki/Douglas_Houghton_Campbell" title="Douglas Houghton Campbell">Douglas Houghton Campbell</a> (1913)</li> <li><a href="/wiki/A._S._Hitchcock" title="A. S. Hitchcock">A. S. Hitchcock</a> (1914)</li> <li><a href="/wiki/John_Merle_Coulter" title="John Merle Coulter">John Merle Coulter</a> (1915)</li> <li><a href="/wiki/Robert_Almer_Harper" title="Robert Almer Harper">Robert Almer Harper</a> (1916)</li> <li><a href="/wiki/Frederick_Charles_Newcombe" title="Frederick Charles Newcombe">Frederick Charles Newcombe</a> (1917)</li> <li><a href="/wiki/William_Trelease" title="William Trelease">William Trelease</a> (1918)</li> <li><a href="/wiki/Joseph_Charles_Arthur" title="Joseph Charles Arthur">Joseph Charles Arthur</a> (1919)</li> <li><a href="/wiki/Nathaniel_Lord_Britton" title="Nathaniel Lord Britton">Nathaniel Lord Britton</a> (1920)</li> <li><a href="/wiki/Charles_Elmer_Allen" title="Charles Elmer Allen">Charles Elmer Allen</a> (1921)</li> <li><a href="/wiki/Henry_Chandler_Cowles" title="Henry Chandler Cowles">Henry Chandler Cowles</a> (1922)</li> <li><a href="/wiki/Benjamin_Minge_Duggar" title="Benjamin Minge Duggar">Benjamin Minge Duggar</a> (1923)</li> <li><a href="/wiki/William_Chambers_Coker" title="William Chambers Coker">William Chambers Coker</a> (1924)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">1925–1949</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Jacob_R._Schramm" title="Jacob R. Schramm">Jacob R. Schramm</a> (1925)</li> <li><a href="/wiki/Liberty_Hyde_Bailey" title="Liberty Hyde Bailey">Liberty Hyde Bailey</a> (1926)</li> <li><a href="/wiki/Harley_Harris_Bartlett" title="Harley Harris Bartlett">Harley Harris Bartlett</a> (1927)</li> <li><a href="/wiki/Arthur_Henry_Reginald_Buller" title="Arthur Henry Reginald Buller">Arthur Henry Reginald Buller</a> (1928)</li> <li><a href="/wiki/Margaret_Clay_Ferguson" title="Margaret Clay Ferguson">Margaret Clay Ferguson</a> (1929)</li> <li><a href="/wiki/Lester_W._Sharp" title="Lester W. Sharp">Lester W. Sharp</a> (1930)</li> <li><a href="/wiki/Charles_Joseph_Chamberlain" title="Charles Joseph Chamberlain">Charles Joseph Chamberlain</a> (1931)</li> <li><a href="/wiki/George_James_Peirce" title="George James Peirce">George James Peirce</a> (1932)</li> <li><a href="/wiki/Ezra_Jacob_Kraus" title="Ezra Jacob Kraus">Ezra Jacob Kraus</a> (1933)</li> <li><a href="/wiki/E._D._Merrill" class="mw-redirect" title="E. D. Merrill">E. D. Merrill</a> (1934)</li> <li><a href="/wiki/Aven_Nelson" title="Aven Nelson">Aven Nelson</a> (1935)</li> <li><a href="/wiki/C._Stuart_Gager" title="C. Stuart Gager">C. Stuart Gager</a> (1936)</li> <li><a href="/wiki/Edmund_Ware_Sinnott" title="Edmund Ware Sinnott">Edmund Ware Sinnott</a> (1937)</li> <li><a href="/wiki/Arthur_Johnson_Eames" title="Arthur Johnson Eames">Arthur Johnson Eames</a> (1938)</li> <li><a href="/wiki/Karl_McKay_Wiegand" title="Karl McKay Wiegand">Karl McKay Wiegand</a> (1939)</li> <li><a href="/wiki/Edgar_Nelson_Transeau" title="Edgar Nelson Transeau">Edgar Nelson Transeau</a> (1940)</li> <li><a href="/wiki/John_Theodore_Buchholz" title="John Theodore Buchholz">John Theodore Buchholz</a> (1941)</li> <li><a href="/wiki/Merritt_Lyndon_Fernald" title="Merritt Lyndon Fernald">Merritt Lyndon Fernald</a> (1942)</li> <li><a href="/wiki/William_Jacob_Robbins" title="William Jacob Robbins">William Jacob Robbins</a> (1943)</li> <li><a href="/wiki/Gilbert_Morgan_Smith" title="Gilbert Morgan Smith">Gilbert Morgan Smith</a> (1944)</li> <li><a href="/wiki/Irving_Widmer_Bailey" title="Irving Widmer Bailey">Irving Widmer Bailey</a> (1945)</li> <li><a href="/wiki/Neil_Everett_Stevens" title="Neil Everett Stevens">Neil Everett Stevens</a> (1946)</li> <li><a href="/wiki/Ralph_Erskine_Cleland" title="Ralph Erskine Cleland">Ralph Erskine Cleland</a> (1947)</li> <li><a href="/wiki/Henry_A._Gleason_(botanist)" class="mw-redirect" title="Henry A. Gleason (botanist)">Henry Allan Gleason</a> (1948)</li> <li><a href="/wiki/Ivey_Foreman_Lewis" title="Ivey Foreman Lewis">Ivey Foreman Lewis</a> (1949)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">1950–1974</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Albert_Francis_Blakeslee" title="Albert Francis Blakeslee">Albert Francis Blakeslee</a> (1950)</li> <li><a href="/wiki/Katherine_Esau" title="Katherine Esau">Katherine Esau</a> (1951)</li> <li><a href="/wiki/Edgar_Anderson" title="Edgar Anderson">Edgar Anderson</a> (1952)</li> <li><a href="/wiki/Ralph_H._Wetmore" title="Ralph H. Wetmore">Ralph H. Wetmore</a> (1953)</li> <li><a href="/wiki/Adriance_S._Foster" title="Adriance S. Foster">Adriance S. Foster</a> (1954)</li> <li><a href="/wiki/Oswald_Tippo" title="Oswald Tippo">Oswald Tippo</a> (1955)</li> <li><a href="/wiki/Harriet_Creighton" title="Harriet Creighton">Harriet Creighton</a> (1956)</li> <li><a href="/wiki/George_Sherman_Avery,_Jr." class="mw-redirect" title="George Sherman Avery, Jr.">George Sherman Avery, Jr.</a> (1957)</li> <li><a href="/wiki/Frits_Warmolt_Went" title="Frits Warmolt Went">Frits Warmolt Went</a> (1958)</li> <li><a href="/wiki/William_Campbell_Steere" class="mw-redirect" title="William Campbell Steere">William Campbell Steere</a> (1959)</li> <li><a class="mw-selflink selflink">Kenneth V. Thimann</a> (1960)</li> <li><a href="/wiki/Vernon_Cheadle" title="Vernon Cheadle">Vernon Cheadle</a> (1961)</li> <li><a href="/wiki/G._Ledyard_Stebbins" title="G. Ledyard Stebbins">G. Ledyard Stebbins</a> (1962)</li> <li><a href="/wiki/Constantine_John_Alexopoulos" title="Constantine John Alexopoulos">Constantine John Alexopoulos</a> (1963)</li> <li><a href="/wiki/Paul_J._Kramer" title="Paul J. Kramer">Paul J. Kramer</a> (1964)</li> <li><a href="/wiki/Aaron_John_Sharp" title="Aaron John Sharp">Aaron John Sharp</a> (1965)</li> <li><a href="/wiki/Harold_Charles_Bold" title="Harold Charles Bold">Harold Charles Bold</a> (1966)</li> <li><a href="/wiki/Ralph_Emerson_(botanist)" title="Ralph Emerson (botanist)">Ralph Emerson</a> (1967)</li> <li><a href="/wiki/Arthur_Galston" title="Arthur Galston">Arthur Galston</a> (1968)</li> <li><a href="/wiki/Harlan_Parker_Banks" title="Harlan Parker Banks">Harlan Parker Banks</a> (1969)</li> <li><a href="/wiki/Lincoln_Constance" title="Lincoln Constance">Lincoln Constance</a> (1970)</li> <li><a href="/wiki/Richard_C._Starr" title="Richard C. Starr">Richard C. Starr</a> (1971)</li> <li><a href="/wiki/Charles_Heimsch" title="Charles Heimsch">Charles Heimsch</a> (1972)</li> <li><a href="/wiki/Arthur_Cronquist" title="Arthur Cronquist">Arthur Cronquist</a> (1973)</li> <li><a href="/wiki/Theodore_Delevoryas" title="Theodore Delevoryas">Theodore Delevoryas</a> (1974)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">1975–1999</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Peter_H._Raven" title="Peter H. Raven">Peter H. Raven</a> (1975)</li> <li><a href="/w/index.php?title=Barbara_Frances_Palser&action=edit&redlink=1" class="new" title="Barbara Frances Palser (page does not exist)">Barbara Frances Palser</a> (1976)</li> <li><a href="/wiki/Warren_H._Wagner" title="Warren H. Wagner">Warren H. Wagner</a> (1977)</li> <li><a href="/w/index.php?title=William_August_Jensen&action=edit&redlink=1" class="new" title="William August Jensen (page does not exist)">William August Jensen</a> ( 1978)</li> <li><a href="/wiki/Herbert_George_Baker" class="mw-redirect" title="Herbert George Baker">Herbert George Baker</a> (1979)</li> <li><a href="/wiki/Charles_Bixler_Heiser" title="Charles Bixler Heiser">Charles Bixler Heiser</a> (1980)</li> <li><a href="/wiki/Patricia_Kern_Holmgren" title="Patricia Kern Holmgren">Patricia Kern Holmgren</a> (1981)</li> <li><a href="/w/index.php?title=Ernest_M._Gifford,_Jr.&action=edit&redlink=1" class="new" title="Ernest M. Gifford, Jr. (page does not exist)">Ernest M. Gifford, Jr.</a> (1982)</li> <li><a href="/wiki/Barbara_D._Webster" title="Barbara D. Webster">Barbara D. Webster</a> (1983)</li> <li><a href="/wiki/Mildred_Esther_Mathias" class="mw-redirect" title="Mildred Esther Mathias">Mildred Esther Mathias</a> (1984)</li> <li><a href="/w/index.php?title=William_Louis_Stern&action=edit&redlink=1" class="new" title="William Louis Stern (page does not exist)">William Louis Stern</a> (1985–86)</li> <li><a href="/w/index.php?title=Ray_Franklin_Evert&action=edit&redlink=1" class="new" title="Ray Franklin Evert (page does not exist)">Ray Franklin Evert</a> (1986–87)</li> <li><a href="/wiki/Shirley_Cotter_Tucker" title="Shirley Cotter Tucker">Shirley Cotter Tucker</a> (1987–88)</li> <li><a href="/wiki/W._Hardy_Eshbaugh" title="W. Hardy Eshbaugh">W. Hardy Eshbaugh</a> (1988–89)</li> <li><a href="/w/index.php?title=David_Leonard_Dilcher&action=edit&redlink=1" class="new" title="David Leonard Dilcher (page does not exist)">David Leonard Dilcher</a> (1989–90)</li> <li><a href="/wiki/Beryl_B._Simpson" title="Beryl B. Simpson">Beryl B. Simpson</a> (1990–91)</li> <li><a href="/wiki/William_Louis_Culberson" title="William Louis Culberson">William Louis Culberson</a> (1991–92)</li> <li><a href="/w/index.php?title=Gregory_Joseph_Anderson&action=edit&redlink=1" class="new" title="Gregory Joseph Anderson (page does not exist)">Gregory Joseph Anderson</a> (1992–93)</li> <li><a href="/wiki/Grady_Webster" title="Grady Webster">Grady Webster</a> (1993–94)</li> <li><a href="/w/index.php?title=Harry_T._Horner&action=edit&redlink=1" class="new" title="Harry T. Horner (page does not exist)">Harry T. Horner</a> (1994–95)</li> <li><a href="/wiki/Barbara_A._Schaal" title="Barbara A. Schaal">Barbara A. Schaal</a> (1995–96)</li> <li><a href="/w/index.php?title=Daniel_Crawford_(botanist)&action=edit&redlink=1" class="new" title="Daniel Crawford (botanist) (page does not exist)">Daniel Crawford</a> (1996–97)</li> <li><a href="/w/index.php?title=Nancy_Dengler&action=edit&redlink=1" class="new" title="Nancy Dengler (page does not exist)">Nancy Dengler</a> (1997–98)</li> <li><a href="/w/index.php?title=Carol_C._Baskin&action=edit&redlink=1" class="new" title="Carol C. Baskin (page does not exist)">Carol C. Baskin</a> (1998–99)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">2000–present</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Douglas_E._Soltis" title="Douglas E. Soltis">Douglas E. Soltis</a> (1999–2000)</li> <li><a href="/wiki/Patricia_G._Gensel" title="Patricia G. Gensel">Patricia G. Gensel</a> (2000–1)</li> <li><a href="/w/index.php?title=Judy_Jernstedt&action=edit&redlink=1" class="new" title="Judy Jernstedt (page does not exist)">Judy Jernstedt</a> (2001–2)</li> <li><a href="/w/index.php?title=Scott_D._Russell&action=edit&redlink=1" class="new" title="Scott D. Russell (page does not exist)">Scott D. Russell</a> (2002–3)</li> <li><a href="/w/index.php?title=Linda_E._Graham&action=edit&redlink=1" class="new" title="Linda E. Graham (page does not exist)">Linda E. Graham</a> (2003–4)</li> <li><a href="/w/index.php?title=Allison_A._Snow&action=edit&redlink=1" class="new" title="Allison A. Snow (page does not exist)">Allison A. Snow</a> (2004–5)</li> <li><a href="/w/index.php?title=Edward_L._Schneider_(botanist)&action=edit&redlink=1" class="new" title="Edward L. Schneider (botanist) (page does not exist)">Edward L. Schneider</a> (2005–6)</li> <li><a href="/w/index.php?title=Christopher_H._Haufler&action=edit&redlink=1" class="new" title="Christopher H. Haufler (page does not exist)">Christopher H. Haufler</a> (2006–7)</li> <li><a href="/wiki/Pamela_S._Soltis" title="Pamela S. Soltis">Pamela S. Soltis</a> (2007–8)</li> <li><a href="/wiki/Karl_J._Niklas" title="Karl J. Niklas">Karl J. Niklas</a> (2008–9)</li> <li><a href="/w/index.php?title=Kent_Holsinger&action=edit&redlink=1" class="new" title="Kent Holsinger (page does not exist)">Kent Holsinger</a> (2009–10)</li> <li><a href="/w/index.php?title=Judith_Skog&action=edit&redlink=1" class="new" title="Judith Skog (page does not exist)">Judith Skog</a> (2010–11)</li> <li><a href="/w/index.php?title=Stephen_G._Weller&action=edit&redlink=1" class="new" title="Stephen G. Weller (page does not exist)">Stephen G. Weller</a> (2011–12)</li> <li><a href="/w/index.php?title=Elizabeth_Kellogg&action=edit&redlink=1" class="new" title="Elizabeth Kellogg (page does not exist)">Elizabeth Kellogg</a> (2012–13)</li> <li><a href="/w/index.php?title=Pamela_Diggle&action=edit&redlink=1" class="new" title="Pamela Diggle (page does not exist)">Pamela Diggle</a> (2013–14)</li> <li><a href="/w/index.php?title=Tom_Ranker&action=edit&redlink=1" class="new" title="Tom Ranker (page does not exist)">Tom Ranker</a> (2014–15)</li> <li><a href="/w/index.php?title=Richard_Olmstead&action=edit&redlink=1" class="new" title="Richard Olmstead (page does not exist)">Richard Olmstead</a> (2015–16)</li> <li><a href="/w/index.php?title=Gordon_Uno&action=edit&redlink=1" class="new" title="Gordon Uno (page does not exist)">Gordon Uno</a> (2016–17)</li> <li><a href="/wiki/Loren_Rieseberg" class="mw-redirect" title="Loren Rieseberg">Loren Rieseberg</a> (2017–18)</li> <li><a href="/w/index.php?title=Andrea_Wolfe&action=edit&redlink=1" class="new" title="Andrea Wolfe (page does not exist)">Andrea Wolfe</a> (2018–19)</li> <li><a href="/w/index.php?title=Linda_Watson_(botanist)&action=edit&redlink=1" class="new" title="Linda Watson (botanist) (page does not exist)">Linda Watson</a> (2019–20)</li> <li><a href="/w/index.php?title=Cynthia_S._Jones&action=edit&redlink=1" class="new" title="Cynthia S. Jones (page does not exist)">Cynthia S. Jones</a> (2020–21)</li> <li><a href="/wiki/Michael_Donoghue" title="Michael Donoghue">Michael Donoghue</a> (2021–22)</li> <li><a href="/w/index.php?title=Vivian_Negron-Ortiz&action=edit&redlink=1" class="new" title="Vivian Negron-Ortiz (page does not exist)">Vivian Negron-Ortiz</a> (2022–23)</li> <li><a href="/w/index.php?title=Brenda_Molano-Flores&action=edit&redlink=1" class="new" title="Brenda Molano-Flores (page does not exist)">Brenda Molano-Flores</a> (2023–24)</li> <li><a href="/w/index.php?title=Jenny_Xiang&action=edit&redlink=1" class="new" title="Jenny Xiang (page does not exist)">Jenny Xiang</a> (2024–2025)</li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox authority-control" aria-labelledby="Authority_control_databases_frameless&#124;text-top&#124;10px&#124;alt=Edit_this_at_Wikidata&#124;link=https&#58;//www.wikidata.org/wiki/Q6390769#identifiers&#124;class=noprint&#124;Edit_this_at_Wikidata" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Authority_control_databases_frameless&#124;text-top&#124;10px&#124;alt=Edit_this_at_Wikidata&#124;link=https&#58;//www.wikidata.org/wiki/Q6390769#identifiers&#124;class=noprint&#124;Edit_this_at_Wikidata" style="font-size:114%;margin:0 4em"><a href="/wiki/Help:Authority_control" title="Help:Authority control">Authority control databases</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q6390769#identifiers" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">International</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://isni.org/isni/0000000109318750">ISNI</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://viaf.org/viaf/108736065">VIAF</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://id.worldcat.org/fast/1721798/">FAST</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://id.oclc.org/worldcat/entity/E39PBJkpbpqkWQMdPKCX3R6Frq">WorldCat</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">National</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://d-nb.info/gnd/117724998">Germany</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://id.loc.gov/authorities/n79058532">United States</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://catalogue.bnf.fr/ark:/12148/cb12275172k">France</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://data.bnf.fr/ark:/12148/cb12275172k">BnF data</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://id.ndl.go.jp/auth/ndlna/00526721">Japan</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://aleph.nkp.cz/F/?func=find-c&local_base=aut&ccl_term=ica=skuk0005579&CON_LNG=ENG">Czech Republic</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://data.bibliotheken.nl/id/thes/p068313764">Netherlands</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://authority.bibsys.no/authority/rest/authorities/html/90252144">Norway</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://libris.kb.se/pm14805709mfsv4">Sweden</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://olduli.nli.org.il/F/?func=find-b&local_base=NLX10&find_code=UID&request=987007281904405171">Israel</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Academics</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://ci.nii.ac.jp/author/DA01073622?l=en">CiNii</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://www.scopus.com/authid/detail.uri?authorId=35847297800">Scopus</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://www.leopoldina.org/mitgliederverzeichnis/mitglieder/member/Member/show/kenneth-v-thimann/">Leopoldina</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">People</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://www.deutsche-biographie.de/pnd117724998.html?language=en">Deutsche Biographie</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://www.idref.fr/031560024">IdRef</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://snaccooperative.org/ark:/99166/w6x06rfd">SNAC</a></span></li></ul></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" 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