Taxonomic Revision of Geranium Sections Batrachioidea and Divaricata (Geraniaceae)
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چکیده
منابع مشابه
Ex uno, multis: taxonomic revision in Navarretia divaricata (Polemoniaceae) and the recognition of four additional cryptic or near-cryptic species
Navarretia divaricata, endemic to western North America and most recently considered a single species with two subspecies, was re-examined in light of field work, DNA sequences, comparative morphology, and a review of herbarium specimens including types. From these studies, we lectotypify the material on which N. divaricata is based, elevate N. divaricata subsp. vividior, which is an allotetrap...
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One of the major evolutionary trends in flowering plants is the evolution of unisexual flowers (male or female) from perfect flowers. This transition has occurred repeatedly in many taxa and has generated a wonderful array of variation in sexual expression among species. Theoretical studies have proposed a number of mechanisms to explain how this level of variation could be maintained in natura...
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ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1998
ISSN: 0026-6493
DOI: 10.2307/2992018