Helianthus argophyllus Torrey & A. Gray. Silverleaf Sunflower. Phen: Jul-Oct. Hab: Dunes and disturbed sandy soils. Dist: Native of s. and se. TX. Heiser et al. (1969) noted a collection from NC, but stated their uncertainty as to its establishment. H. argophyllus is well-established near Captain Charlie's on Bald Head Island, Brunswick County, where it has apparently persisted and spread over the last 50 years (at least).
Origin/Endemic status: Endemic
Synonymy: = Bah, F, Fl7, FNA21, K1, K3, K4, S, SE1, Tx, WH3; = n/a – RAB
Heliophily: 0
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