Abstract
Light and scanning microscopies were used to evaluate the sectional boundary of 17 species included by various authors inEuphorbia sectTithymalopsis. Based on seed shape, surface ornamentation, and mucilage formation, five seed morphological types were recognized in North American sectionTithymalopsis and related species. These results did not provide added support for recent treatment of the sectTithymalopsis s.s. However, a close relationship was suggested among species of theTithymalopsis subsectionCorollatae. In addition, including species from subsectionsInnocuae, Ipecacuanhae, andSphaerorhizae within sectTithymalopsis could not be justified, based on seed morphological data.
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Park, KR. Seed morphology ofEuphorbia sectionTithymalopsis (Euphorbiaceae) and related species. J. Plant Biol. 43, 76–81 (2000). https://doi.org/10.1007/BF03030498
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DOI: https://doi.org/10.1007/BF03030498