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 lanceloate basal leaves and narrowly linear cauline leaves. References External links Photo of herbarium specimen at Missouri Botanical Garden, collected in Arkansas, isotype of Houstonia ouachitana ouachitana Flora of Arkansas Flora of Oklahoma Endemic flora of the United States Plants described in 1977 Flora without expected TNC conservation status