Asclepias hirtella (Pennell) Woodson. Green Milkweed, Barrens Milkweed, Prairie Milkweed. Phen: Apr-Oct; Jun-Oct. Hab: Prairies (on loamy or clayey soils), sub-calcareous hardwood flatwoods. Dist: MI, WI, and MN south to w. WV (Mason County), KY, e. TN (Bradley County) (Chester, Wofford, & Kral 1997), nw. GA (Jones & Coile 1988), AR, w. LA, and ... More @Wikipedia
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