Houstonia acerosa, the New Mexico bluet or needleleaf bluet, is a plant species native to Chihuahua, Coahuila, Nuevo León, Tamaulipas, San Luis Potosí, Texas and New Mexico. Houstonia acerosa is an herb up to 20 cm tall, with narrow needle-like leaves and white or purplish flowers. Varieties Three varieties of the species are widely accepted: Houstonia acerosa var. acerosa - Coahuila, Nuevo León, Tamaulipas, San Luis Potosí, Texas Houstonia acerosa var. polypremoides (A.Gray) Terrell - Chihuahua, Coahuila, New Mexico, trans-Pecos Texas Houstonia acerosa var. tamaulipana (B.L.Turner) Terrell - Tamaulipas References External links Photo of herbarium specimen at Missouri Botanical Garden, Wright 237, type specimen of Houstonia acerosa Gardening Europe Houstonia acerosa Chihuahuan Desert Plants, University of Texas at El Paso, Hedyotis acerosa acerosa Flora of Texas Flora of New Mexico Flora of Mexico Flora of Chihuahua (state) Flora of Coahuila Flora of Nuevo León Flora of Tamaulipas Flora of San Luis Potosí Plants described in 1852 Taxa named by Asa Gray