Ambrosia porcheri P.D. McMillan & L. Prevost. Outcrop Ragweed. Phen: Aug-late Oct. Hab: In shallow soil mats on granitic domes. Dist: Apparently endemic to the Piedmont Blue Ridge escarpment region of nw. SC.
Origin/Endemic status: Endemic
Syn: = McMillan & Prevost (2022), in prep.; < Ambrosia artemisiifolia L. – FNA21, K3, K4, RAB, SE1
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