Houstonia ouachitana, the Ouachita bluet, is a species of plants in the coffee family. It is endemic to the Ouachita Mountains of Arkansas and Oklahoma. It is an herb up to 20 cm tall, with lanceolate basal leaves and narrowly linear cauline leaves.Terrell, Edward Everett. 1988. Phytologia 65(2): 119, Houstonia ouachitana Smith, Edwin Burnell. 1977. Hedyotis ouachitana (Rubiaceae): a new species from the Ouachita Mountains of Arkansas and Oklahoma. Brittonia 28: 453–459, f. 1–2. Hedyotis ouachitana
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External links Photo of herbarium specimen at Missouri Botanical Garden, collected in Arkansas, isotype of Houstonia ouachitana