Xylorhiza wrightii

(A. Gray) Greene

Pittonia 3: 47. 1896.

Common names: Big Bend woody-aster
Illustrated
Basionym: Aster wrightii A. Gray Smithsonian Contr. Knowl. 5(6): 75. 1853
Synonyms: Machaeranthera wrightii (A. Gray) Cronquist & D. D. Keck
Treatment appears in FNA Volume 20. Treatment on page 409. Mentioned on page 407.

Subshrubs or perennials, (15–)20–40(–54) cm. Stems branched mostly in proximal 3/4, glabrous, densely stipitate-glandular. Leaf blades spatulate to obovate or oblong, rarely elliptic, 5–24 mm wide, bases attenuate, not clasping, margins flat, toothed to entire (densely short-ciliate), faces densely stipitate-glandular, otherwise glabrous. Peduncles 5–10 cm. Involucres (20–)25–35(–40) × (20–)28–40(–48) mm. Ray florets (18–)24–32(–34); corollas usually light blue to purple, rarely white. Style-branch appendages equaling or shorter than stigmatic lines. 2n = 12.


Phenology: Flowering Mar–May.
Habitat: Barren areas, alkaline, rocky-clay soil, gypsum or limestone flats, shaly slopes, rocky hills, dominated by saltbush, creosote bush, catclaw, and yucca
Elevation: 700–1100 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Xylorhiza wrightii"
Guy L. Nesom +
(A. Gray) Greene +
Aster wrightii +
Big Bend woody-aster +
Tex. +  and Mexico (Chihuahua). +
700–1100 m +
Barren areas, alkaline, rocky-clay soil, gypsum or limestone flats, shaly slopes, rocky hills, dominated by saltbush, creosote bush, catclaw, and yucca +
Flowering Mar–May. +
Illustrated +
Machaeranthera wrightii +
Xylorhiza wrightii +
Xylorhiza +
species +