Perityle ciliata |
Perityle aglossa |
|
---|---|---|
fringe rock daisy, hairy rock-daisy |
bluff rock daisy, rayless rock daisy |
|
Habit | Subshrubs, 15–30 cm (in rock crevices, stems relatively many, erect to pendulous); sparsely to densely short-hairy, glandular. | Perennials or subshrubs, 15–45 cm (in rock crevices); glandular-pubescent. |
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. |
petioles 8–23 mm; blades ovate, subcordate, or subdeltate, 6–20 × 5–25 mm, margins irregularly lobed, laciniate, serrate-dentate, or shallowly 3-lobed. |
Peduncles | 5–25 mm. |
10–25 mm. |
Involucres | campanulate. |
campanulate. |
Ray florets | 6–10; corollas white, sometimes pink tinged, laminae broadly oblong to oblong-elliptic, 3–7 × 1.5–3 mm. |
0. |
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. |
20–60; corollas yellow, often pink or purple tinged, tubes 1–1.7 mm, throats tubular, 2.1–3.2 mm, lobes 0.4–0.6 mm. |
Phyllaries | 13–20, linear-lanceolate to narrow-ovate, 4–5.5 × 1–2 mm. |
14–24, linear to linear-lanceolate, (5–)6–10 × 0.5–1 mm, apices long-attenuate. |
Heads | in corymbiform arrays, 5–7 × 5.5–7 mm. |
borne singly or (2–3) in corymbiform arrays, 8–11 × 4–8 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. |
oblong to narrowly oblanceolate, (1–)2–3.2 mm, margins prominently calloused, densely ciliate; pappi of 1(–2) antrorsely barbellate bristles 3.5–6 mm plus crowns of hyaline, laciniate scales. |
2n | = 34. |
= 34. |
Perityle ciliata |
Perityle aglossa |
|
Phenology | Flowering spring–fall. | Flowering spring–fall. |
Habitat | In rock crevices | Limestone rock crevices |
Elevation | 1100–2500 m (3600–8200 ft) | 600–1300 m (2000–4300 ft) |
Distribution |
AZ
|
TX; Mexico (Coahuila) |
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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Perityle aglossa is consistently discoid and occurs in limestone crevices along and near the Rio Grande in Brewster and Terrell counties. A combination of subtle characteristics including shallower leaf lobing, narrower shape and more attenuate apices of the phyllaries, shorter cypselae, and proportionally longer pappus bristles distinguish these plants from the rayless ones of P. parryi. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 322. | FNA vol. 21, p. 323. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Peritylinae > Perityle > sect. Perityle | Asteraceae > tribe Heliantheae > subtribe Peritylinae > Perityle > sect. Perityle |
Sibling taxa | ||
Synonyms | Laphamia ciliata | Laphamia aglossa |
Name authority | (L. H. Dewey) Rydberg: in N. L. Britton et al., N. Amer. Fl. 34: 17. (1914) | A. Gray: Smithsonian Contr. Knowl. 5(6): 107. (1853) |
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