Taxon: Asclepias subverticillata (A. Gray) Vail

Genus: Asclepias
Family: Apocynaceae
Subfamily: Asclepiadoideae
Tribe: Asclepiadeae
Subtribe: Asclepiadinae
Nomen number: 316575
Place of publication: Bull. Torrey Bot. Club 25:178. 1898
Link to protologue:
Name Verified on: 05-Jul-2011 by ARS Systematic Botanists. Last Changed: 05-Jul-2011
Species priority site is: Western Regional PI Station (W6)
Accessions: 7 in National Plant Germplasm System (GoogleMap)

Common names:

  • horsetail milkweed  (Source: L New Mex) - English
  • poison milkweed  (Source: F New Mex) - English
  • whorled milkweed  (Source: Intermt F) - English

Economic Importance:

  • Vertebrate poisons: mammals (fide Kingsbury)

Distributional Range:


  • Northern America

    • North-Central U.S.A.: United States Kansas, Missouri, North Dakota, Oklahoma, South Dakota
    • Northern Mexico: Mexico Chihuahua, Coahuila, Durango, Nuevo Leon, San Luis Potosi, Zacatecas
    • Northwestern U.S.A.: United States Colorado, Idaho, Wyoming
    • South-Central U.S.A.: United States New Mexico, Texas
    • Southwestern U.S.A.: United States Arizona, Nevada, Utah


  • Allred, Kelly W. Flora Neomexicana I: The vascular plants of New Mexico, an annotated checklist to the names of vascular plants with synonymy and bibliography. (L New Mex)
  • Correll, D. S. & M. C. Johnston Manual of the vascular plants of Texas. 1970 (F Tex)
  • Cronquist, A. et al. Intermountain flora. (Intermt F)
  • Kartesz, J. T. North American plant atlas. The Biota of North America Program (BONAP). 2011 (NAmer Pl Atlas)
  • Kingsbury, J. M. Poisonous plants of the United States and Canada. (Kingsbury)
  • Martin, W. C. & C. R. Hutchins A flora of New Mexico. (F New Mex)
  • McGregor, R. L. et al. (The Great Plains Flora Association) Flora of the Great Plains. (F GPlains)
  • Shreve, F. & I. L. Wiggins Vegetation and flora of the Sonoran desert. (F SonorDes)


Check other web resources for Asclepias subverticillata (A. Gray) Vail :