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HABITAL VARIATION IN THE HAWAIIAN MADIINAE (HELIANTHEAE) AND ITS RELEVANCE TO GENERIC CONCEPTS IN THE COMPOSITAE
Author(s) -
Carr Gerald D.
Publication year - 1985
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1221559
Subject(s) - heliantheae , sensu , monophyly , biology , evolutionary biology , chromosome number , variation (astronomy) , zoology , botany , clade , genus , chromosome , phylogenetics , asteraceae , genetics , karyotype , gene , physics , astrophysics
Summary The Hawaiian Madiinae constitute a genetically cohesive and presumably monophyletic alliance of 28 species of extreme habital diversity which traditionally have been dispersed among four genera that are defined primarily by floral and foliar features. Dozens of natural and artificial hybrids between generic and habital categories have been produced. Cytogenetic data indicate that definition of genera according to habit would result in a number of fragmentary groups, each heterogeneous with respect to chromosome number and/or structure. Moreover, in a number of instances species of known cytogenetic identity would be placed in two or more different genera. Disposition of the 28 species in three traditionally recognized genera is recommended. These are Dubautia sensu lato, Argyroxiphium , and Wilkesia.