Perityle vaseyi

J. M. Coulter

Contr. U.S. Natl. Herb. 1: 42. 1890.

Common names: Vasey’s rock daisy
Treatment appears in FNA Volume 21. Treatment on page 323. Mentioned on page 321.

Perennials or subshrubs, (10–)15–75 cm (in soil, tap roots fleshy, stems erect or spreading); glandular-pubescent. Leaves: petioles 10–35 mm; blades usually palmately 3-lobed or ± cruciform, 6–35 × 10–50 mm, lobes usually again ternately dissected, cleft, or parted. Heads borne singly or (2–3) in corymbiform arrays, 8–10 × 10–13 mm. Peduncles 10–80 mm. Involucres campanulate to hemispheric. Phyllaries 20–30, oblanceolate or lanceolate to linear-lanceolate, 6–7 × 1–2 mm, apices usually acute, sometimes short-attenuate. Ray florets 12–18; corollas yellow, laminae oblong, 4–10 × 2–4 mm. Disc florets 50–100; corollas yellow, tubes 1.2–1.5 mm, throats tubular to broadly tubular, 2.2–3 mm, lobes 0.4–0.6 mm. Cypselae linear-elliptic to narrowly oblanceolate, (2–)3–4 mm, margins usually prominently calloused, sometimes thin, usually densely ciliate, sometimes short-hairy; pappi 0 or of 1(–2) retrorsely or erectly barbellate (at least near tips) bristles 1–4 mm plus crowns of hyaline, laciniate scales. 2n = 34.


Phenology: Flowering year around.
Habitat: Desert soils, especially gypsiferous clays
Elevation: 700–1800 m

Distribution

V21-801-distribution-map.gif

Tex., Mexico (Chihuahua, Coahuila).

Discussion

Perityle vaseyi is always found growing in soil, often on roadsides and in road cuts in the southwestern Big Bend area. The more deeply dissected leaves, shorter pappus bristles with barbellate tips, and broader phyllaries help distinguish it from the soil-growing form of P. parryi.

Selected References

None.

Lower Taxa

None.
... more about "Perityle vaseyi"
Sharon C. Yarborough +  and A. Michael Powell +
J. M. Coulter +
Vasey’s rock daisy +
Tex. +, Mexico (Chihuahua +  and Coahuila). +
700–1800 m +
Desert soils, especially gypsiferous clays +
Flowering year around. +
Contr. U.S. Natl. Herb. +
Undefined (tribe Undefined) subtribe Amauriinae +
Perityle vaseyi +
Perityle sect. Perityle +
species +