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CHROMOSOME NUMBERS IN COMPOSITAE. IX. HAPLOPAPPUS AND OTHER ASTEREAE
Author(s) -
Anderson Loran C.,
Kyhos Donald W.,
Mosquin Theodore,
Powell A. Michael,
Raven Peter H.
Publication year - 1974
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1974.tb12286.x
Subject(s) - biology , subspecies , herbaceous plant , botany , tribe , chromosome , asteraceae , zoology , genetics , gene , sociology , anthropology
Reports of 209 original chromosome counts are made for the tribe Astereae of Compositae, including first counts for two genera and 46 species or subspecies. With over 80 % of the species counted, chromosome numbers are now available for all North American sections of Haplopappus. Two major groupings are apparent: one, with basic numbers of x = 4, 5, or 6, is basically herbaceous; the other, with x = 9, consists of shrubs or subshrubs. Aneuploidy is known only in the “herbaceous” group of Haplopappus , and polyploidy is more extensive there than in the woodier group of sections.