A numerical study of the common narrow-leaved taxa of chenopodium occurring in the Western United States
A numerical taxonomic study was conducted on the common narrow-leaved members of the genus Chenopodium that occur in the western United States. As many as six and as few as two species have been recognized. Thirty-five individual popu lations were used as OTU’s, and 35 characters were considered. The data were subjected to cluster (both the weighted-pair group method and the within-group dispersion method) and principal component analysis. The results of both analyses are in general agreement and suggest phenetic relationships that differ from current interpretations in the literature. It is concluded that C. desiccatum var. leptophylloides is much more closely related phenetically to C. atrovirens (and may not be distinct from it) than it is to C. desiccatum var. desiccatum. Chenopodium hians and C. leptophyllum appear to be phenetically distinct despite the fact that they have sometimes been viewed as conspecific. Cheno podium subglabrum is not very similar to C. leptophyllum, and should probably be treated as a separate species rather than as a variety of the latter. Popu lations referable to C. incognitum form a rather loose cluster that appears some what intermediate between populations of C. desiccatum var. leptophylloides, C. atrovirens, C. hians, and C. leptophyllum. © 1974, The New York Botanical Garden. All rights reserved.
Crawford, DJ; Reynolds, JF
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