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(American Journal of Botany. 2001;88:499-502.)
© 2001 Botanical Society of America, Inc.

Chromosome studies: Mexican Compositae1

John L. Strother 2, 4 and Jose L. Panero 3

2University Herbarium, 1001 Valley Life Sciences Building #2465, University of California, Berkeley, California 94720-2465 USA; and 3School of Biological Sciences, Section of Integrative Biology, University of Texas, Austin, Texas 78712 USA

Chromosome observations reported here from 70 collections representing 65 species from 40 genera of Compositae (mostly Heliantheae) provide taxonomically useful information. First counts for 28 species, including the first count for Psacaliopsis, may prove to be especially interesting in relation to phyletic and taxonomic alignments of the taxa. Of special interest among first reports is 2n = 5 II for Stevia lita; other stevias have x = 11, 12, or 17. Thirteen of our counts differ from prior reports and may also be of particular interest in phyletic and taxonomic contexts.

Key Words: Asteraceae • chromosomes • Compositae • Heliantheae • phylogeny • systematics • taxonomy




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M. D. Windham and G. Yatskievych
Chromosome studies of cheilanthoid ferns (Pteridaceae: Cheilanthoideae) from the western United States and Mexico
Am. J. Botany, December 1, 2003; 90(12): 1788 - 1800.
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