Phylogenetic Implications of Pollen Ultrastructure in the Oldfieldioideae (Euphorbiaceae) Author(s): Geoffrey A. Levin and Michael G. Simpson Source: Annals of the Missouri Botanical Garden, Vol. 81, No. 2 (1994), pp. 203-238 Published by: Missouri Botanical Garden Press Stable URL: http://www.jstor.org/stable/2992094 Accessed: 13-04-2015 18:50 UTC Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact
[email protected]. Missouri Botanical Garden Press is collaborating with JSTOR to digitize, preserve and extend access to Annals of the Missouri Botanical Garden. http://www.jstor.org This content downloaded from 146.244.235.206 on Mon, 13 Apr 2015 18:50:29 UTC All use subject to JSTOR Terms and Conditions PHYLOGENETIC GeoffreyA. Levin2 and Michael G. Simpson3 IMPLICATIONSOF POLLEN ULTRASTRUCTUREIN THE OLDFIELDIOIDEAE (EUPHORBIACEAE)1 ABSTRACT The pollen structure of members of Euphorbiaceae subfamilies Oldfieldioideaeand Phyllanthoideae was studied using scanning and transmission electron microscopy in order to assess taxonomic relationships. We identified 10 palynological characters that appear to have systematic significance. We also identified 37 characters of vegetative morphology and anatomy, mostly based on data obtained by Hayden, and five characters of reproductive morphology, based on data in the literature.