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CYTOGEOGRAPHIC STUDIES IN DICENTRA. I. DICENTRA FORMOSA AND D. NEVADENSIS
Author(s) -
Stern Kinfsley R.
Publication year - 1968
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.1537-2197.1968.tb07420.x
Subject(s) - biology , sympatric speciation , perennial plant , race (biology) , genus , ploidy , ecology , botany , biochemistry , gene
Dicentra formosa (Haw.) Walp. is morphologically the most variable of the nine North American species in the genus. It constitutes a complex of rhizomatous perennials distributed throughout mountainous regions of the Pacific States. Dicentra nevadensis Eastw. is confined to high elevations in Tulare County, California. Two chromosomal races of Dicentra formosa exist. A tetraploid race, with n = 16, appears to be confined to coastal mountains and valleys, while a diploid race, with n = 8, is distributed along inland mountain ranges, except in Josephine County, Oregon, where the two races could be sympatric. Morphological associations with ploidy level occur, but they appear to be inconstant.