Systematics of Isocarpha (Compositae: Eupatorieae)
نویسنده
چکیده
Isocarpha comprises five species ranging from southern Texas and the Bahamas to northern Peru and northeastern Brazil. The genus belongs in Eupatorieae rather than Heliantheae, but structure of the head of Isocarpha with its elongate, chaffy receptacle is anomalous within Eupatorieae. An hypothesis is presented suggesting the evolutionary derivation of this type of head through formation of floral buds in the axils of the involucral bracts. Generic ties of Isocarpha within Eupatorieae are unclear, but the closest affinities appear to be with Ayapana and
منابع مشابه
Everywhere but Antarctica: Using a supertree to understand the diversity and distribution of the Compositae
s. Albuquerque, New Mexico, August 12-16, 2001. Botanical Society of America. Pp. 132. Panero, J.L., Baldwin, B.G., Schilling, E.E. & Clevinger, J.A. 2001c. Molecular phylogenetic studies of members of tribes Helenieae, Heliantheae, and Eupatorieae (Asteraceae). 3. General systematics and proposed taxonomic changes in current classification. In: Botany 2001 Abstracts. Albuquerque, New Mexico, A...
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