Perityle huecoensis

A. M. Powell

Madroño 30: 219, fig. 2. 1983.

Common names: Hueco rock daisy
Conservation concern
Treatment appears in FNA Volume 21. Treatment on page 333. Mentioned on page 324.

Perennials or subshrubs, 10–20 cm; densely short-hairy. Leaves: petioles 10–80 mm; blades broadly ovate, ovate-deltate, or ovate-rhombic, 5–12(–15) × 4–10(–15) mm, margins entire or serrate-lobed. Heads borne singly or in corymbiform arrays, 5.5–6 × 4–6 mm. Peduncles 5–15 mm. Involucres funnelform. Phyllaries 8–10, lanceolate to oblanceolate, 3–4.5 × 0.6–1.2 mm. Ray florets 3–5; corollas yellow, laminae oblong, 2.5–3 × 1.5–2 mm. Disc florets 11–13; corollas yellow, tubes 1.3–1.5 mm, throats broadly campanulate-funnelform, 0.8–1.2 mm, lobes 0.5–0.7 mm. Cypselae linear-lanceolate, 2.2–3.2 mm, margins usually thin-calloused, short-hairy; pappi usually of 1–3, antrorsely barbellate bristles 1–2.5 mm plus 0–4 shorter bristles, sometimes plus hyaline, laciniate scales. 2n = 34.


Phenology: Flowering spring–fall.
Habitat: Limestone cliffs
Elevation: 1400–1500 m

Discussion

Of conservation concern.

Perityle huecoensis is found in the United States only in the Hueco Mountains of El Paso County, generally growing on north or northeast facing slopes. Plants in the nearby Sierra Juarez in Mexico tend to lack bristles in pappi on the disc florets and to be taller with larger leaves compared to plants in the United States populations.

Selected References

None.

Lower Taxa

None.
... more about "Perityle huecoensis"
Sharon C. Yarborough +  and A. Michael Powell +
A. M. Powell +
Undefined sect. Laphamia +
Hueco rock daisy +
Tex. +  and Mexico (Chihuahua). +
1400–1500 m +
Limestone cliffs +
Flowering spring–fall. +
Conservation concern +
Undefined (tribe Undefined) subtribe Amauriinae +
Perityle huecoensis +
Perityle sect. Laphamia +
species +