Studies on Arabis (Cruciferae) of Western North America

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Abstract
In bringing my monograph of western North American Arabis, published in 1941, up to date, a considerable extension of information concerning previously little known taxa has been made. Range extensions or clarification of the taxonomy of Arabis fernaldiana and A. shockleyi is given. A putative hybrid between A. holboellii var. pendulocarpa and a new species, A. williamsii, is discussed. New taxa, A. ophira from Nevada, A. lasiocarpa and A. pulchra M. E. Jones var. duchesnensis from Utah, and A. williamsii, from Wyoming are described.

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