Illustration of <i><a href="//commons.wikimedia.org/wiki/Crossosoma_californicum" title="Crossosoma californicum">Crossosoma californicum</a></i>
Sir Joseph Dalton Hooker (1818-1911), William Botting Hemsley (1843-1924)
1904
Curtis's botanical magazine vol. 130 ser. 3 nr. 60 tabl. 7949 (<a rel="nofollow" class="external free" href="http://www.botanicus.org/page/451353">http://www.botanicus.org/page/451353</a>)