Abstract
Descriptions, illustrations, and distribution data are given for four annual species of Chenopodiaceae native to western North America: Atriplex argentea Nutt., A. truncata (Torrey) Gray, A. powellii Watson, and A. dioica (Nutt.) Macbr. All four species have the same chromosome number, 2n = 18. Scanning electron photomicrographs of the pollen grains are included.
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