Xylorhiza wrightii [Asteraceae]


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Scientific Name Xylorhiza wrightii (Machaeranthera wrightii) USDA PLANTS Symbol XYWR
Common Name Terlingua Aster, Big Bend Woodyaster ITIS Taxonomic Serial No. 38702
Family Asteraceae (Sunflower) Flora of North America Ref. Click Here
Description Habitat: Desert environment; rocky-clay soil, alkaline, gypsum or limestone flats, shaly slopes, rocky hills, barren areas.
Plant: Upright perennial, 4 to 16 inches tall; branched in lower portion; stems densely covered by small, forked, glandular hairs.
Leaves: Alternate, stalkless, spatulate to obovate or oblong blades 3/4 to 2 inches long and up to 3/4-inch wide; margins nearly entire or with a few teeth; upper surface with short, glandular hairs; fewer and smaller upper leaves.
Inflorescence: Solitary flower heads up to 2-1/2 inches across and 1-1/2-inches long on peduncles up to 4 inches long; narrow, somewhat recurved, pointed phyllaries with sticky hairs; 16 to 40 pink to bluish-violet rays and many yellow disk florets.
Bloom Period: March to May.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of Texas" by Geyata Ajilvsgi, Flora of North America and American Southwest.
Notes: Somewhat rare; endemic to just a few counties in Far West Texas.
BONAP Distribution Map

Texas Status:

© Tom Lebsack 2023