RUBIACEAE

Houstonia lanceolata (Poiret) Britton. Midwestern Summer Bluet, Lanceleaf Bluet, Glade Mountain Houstonia. Phen: May-Jul; Jul-Aug. Hab: Calcareous prairies and barrens, dry woodlands, banks, rock outcrops, shallow soils around mafic and calcareous rock outcrops. Dist: H. lanceolata ranges from s. ME and w. NY west to s. OH, and sw. MO, south to w. NC, n. GA, AL, MS, AR, and e. OK. The distribution and ecology of H. lanceolata in our area are poorly known; it apparently occupies drier and typically more circumneutral sites than H. purpurea.

Origin/Endemic status: Native

Syn: = F, Il, S; = Houstonia purpurea var. calycosa – Ar, G, K1, K3, K4, NE, NY, Tn, WV, Terrell (1959), Terrell (1991), Terrell (1996); < Hedyotis purpurea – C, Rogers (1987); < Houstonia purpurea – Mo3, Pa, RAB, W

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