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Houstonia nigricans (Lamarck) Fernald var. pulvinata (Small) Fosberg. Florida Dune Diamond-flower. Phen: Jun. Hab: Coastal dunes. Dist: FL peninsula (Flagler and St. Johns counties).

Origin/Endemic status: Endemic

Taxonomy Comments: Controversial as to recognition.

Synonymy: = Terrell (1986); = Hedyotis nigricans (Lam.) Fosberg var. pulvinata (Small) Fosberg – K1, Turner (1995b); = Houstonia pulvinata Small – S; < Stenaria nigricans (Lam.) Terrell var. nigricans – Fl5, K3, K4, WH3, Terrell (2001)

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Heliophily: 9

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