CYTOTAXONOMIC NOTES ON SOME CIRSIUM SPECIES OF THE WESTERN UNITED STATES

1 November 1963

journal article
Published by Canadian Science Publishing in Canadian Journal of Botany

Vol. 41 (11) , 1553-1567
https://doi.org/10.1139/b63-137

Abstract

Chromosomes numbers of 17 species of the section Onotrophe of Petrak and of one species of the section Dermalolepis Petrak are given. The number 2n = 34, believed to be primitive, is found in 11 species; lower numbers, presumably reduced from 34, are found in two groups of species of the Onotrophe. The taxonomy and relationships of some species are discussed. A new species, Cirsium longistylum Moore & Frankton (2n = 34) from Montana, is described.

Keywords

CIRSIUM SPECIES
WESTERN UNITED
PRESUMABLY REDUCED
CHROMOSOMES NUMBERS
DERMALOLEPIS PETRAK
STATES CHROMOSOMES
CIRSIUM LONGISTYLUM
SECTION DERMALOLEPIS

This publication has 1 reference indexed in Scilit:

CYTOTAXONOMIC STUDIES IN THE TRIBE CYNAREAE (COMPOSITAE)
Canadian Journal of Botany, 1962