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World Checklist of Selected Plant Families (WCSP)



Asclepias engelmanniana var. rusbyi (Vail) Kearney, Leafl. W. Bot. 5: 197 (1949).

Original Compiler: R.Govaerts
This name is not Accepted by:

Allred, K.W. (2012). Flora Neomexicana , ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico. [as Asclepias rusbyi]