Houstonia wrightii, the pygmy bluet, is a plant species in the Rubiaceae.Gray, Asa. 1882. Proceedings of the American Academy of Arts and Sciences 17: 202. Houstonia wrightii It is native to the south-western United States (Arizona, New Mexico, western Texas) and northern Mexico (Chihuahua, Sonora, Hidalgo).Biota of North America ProgramKew World List of Selected Plant FamiliesSouthwest Environmental Information Network
References
External links Northern Arizona Flora Vascular Plants of the Gila Wilderness Gardening Europe Intermountain Region Herbarium Network