Acourtia thurberi

(A. Gray) Reveal & R. M. King

Phytologia 27: 231. 1973

Common names: Thurber’s desertpeony
Basionyms: Perezia thurberi A. Gray Pl. Nov. Thurber., 324. 1854
Treatment appears in FNA Volume 19. Treatment on page 74. Mentioned on page 73.
Plants 40–150 cm (stems sulcate to striate distally, densely glandular). Leaves cauline and/or basal; sessile; blades ovate to ovate-elliptic, 1.5 (cauline)–18 (basal) cm, bases shortly sagittate or clasping, margins acerose-denticulate, faces densely glandular-puberulent. Heads in subcongested corymbiform arrays. Involucres obconic to campanulate, 7–9 mm. Phyllaries in 2–3 series, oblong-oblanceolate, apices acuminate, abaxial faces densely glandular-hairy. Receptacles alveolate, glandular. Florets 3–6; corollas lavender-pink (purple), 7–12 mm. Cypselae subcylindric to subfusiform, 3–7 mm, glandular; pappi bright white, 8–9 mm (rigid). 2n = 54.

Phenology: Flowering Oct–Nov.
Habitat: Gravel and caliche soils in warm Sonoran desert scrub
Elevation: 100–200 m

Distribution

V19-8-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua, Durango, Sonora).

Discussion

References

None.

Lower Taxa

No lower taxa listed.