Flora of the Southeastern United States
2022 Edition

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RUBIACEAE

Houstonia tenuifolia Nuttall. Diffuse-branched Bluet. Phen: Apr-Jul; Jul-Oct. Hab: Usually in dry woodlands, often rocky (especially mafic rocks) or sandy. Dist: This species is centered in the Southern Appalachians and the Ozarks, extending into provinces adjacent to both areas of concentration, ranging overall from PA west to MO and OK, south to SC, GA, and TX; disjunct in Panhandle FL.

Origin/Endemic status: Endemic

Syn: = F, G, Il, RAB, S, Va, W, WV, Terrell (1959); = Hedyotis nuttalliana – C; = Houstonia longifolia – Terrell (1996); < Hedyotis longifolia – Rogers (1987); < Houstonia longifolia – Ar, K1, K3, K4, Mo3, Tn, WH3

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image of plant© Gary P. Fleming [image randomly selected]
image of plant© Bruce A. Sorrie [image randomly selected]