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Houstonia ouachitana (E.B. Smith) Terrell. Ouachita Bluet, Ouachita Houstonia. Phen: Apr-early Jun. Hab: Oak forests, bottomlands, openings, generally in more mesic places than H. tenuifolia. Dist: Ouachita Mountains of sw. AR and se. OK.

Origin/Endemic status: Endemic

Synonymy: = Ar, K4, Terrell (1991), Terrell (1996); = Hedyotis ouachitana E.B.Sm.; < Houstonia tenuifolia Nutt. – Terrell (1959)

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Heliophily ?: 7

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