Perityle ciliata
in N. L. Britton et al., N. Amer. Fl. 34: 17. 1914.
Subshrubs, 15–30 cm (in rock crevices, stems relatively many, erect to pendulous); sparsely to densely short-hairy, glandular. Leaves: petioles 2–15 mm; blades deltate-ovate to ovate-rhombic, 6–23 × 5–24 mm, margins usually entire or serrate to serrate-crenate, sometimes shallow-lobed. Heads in corymbiform arrays, 5–7 × 5.5–7 mm. Peduncles 5–25 mm. Involucres campanulate. Phyllaries 13–20, linear-lanceolate to narrow-ovate, 4–5.5 × 1–2 mm. Ray florets 6–10; corollas white, sometimes pink tinged, laminae broadly oblong to oblong-elliptic, 3–7 × 1.5–3 mm. Disc florets 30–40; corollas yellow, often purple tinged, tubes 0.8–1 mm, throats tubular to tubular-funnelform, 1.2–1.4 mm, lobes 0.3–0.4 mm. Cypselae linear-oblong to oblanceolate, 2–2.8 mm, margins prominently calloused, long-ciliate; pappi of 2(–3+) barbellulate bristles 1.5–2.5 mm plus crowns of hyaline, laciniate scales. 2n = 34.
Phenology: Flowering spring–fall.
Habitat: In rock crevices
Elevation: 1100–2500 m
Discussion
Perityle ciliata is found only in the mountains of central Arizona in Apache, Coconino, Gila, Mohave, and Yavapai counties. It appears to be most closely related to P. coronopifolia.
Selected References
None.