APOCYNACEAE - - Dogbane Family

Asclepias longifolia Michaux — Longleaf Milkweed, Savanna Milkweed

Habitat:

Wet pine savannas. A. longifolia and A. hirtella are closely related; the two taxa have sometimes been treated as distinct only at the rank of subspecies or as “very distinct varieties.”

Habitat information from:
Weakley, Alan S., Flora of the Southern and Mid-Atlantic States, Working Draft of 21 May 2015.

BONAP does not recognize Asclepias hirtella as being distinct from A. longifolia. Therefore, the range map above includes both taxa. In general, the mid-western and inland populations are A. hirtella, and the Coastal Plain collections are A. longifolia.

Kartesz, J.T., The Biota of North America Program (BONAP). 2015. North American Plant Atlas. (http://bonap.net/napa). Chapel Hill, N.C. [maps generated from Kartesz, J.T. 2015. Floristic Synthesis of North America, Version 1.0. Biota of North America Program (BONAP). (in press)].

USDA, NRCS. 2018. The PLANTS Database (http://plants.usda.gov, Various Dates). National Plant Data Team, Greensboro, NC 27401-4901 USA.