Perityle emoryi |
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Emory's Rock daisy |
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Habit | Annuals (sometimes persisting), 2–60 cm (delicate or robust, stems relatively few to many, erect or spreading); puberulent to hirsute, glandular-pubescent. |
Leaves | petioles 3–45 mm; blades ovate, cordate, suborbiculate, or triangular, 17–60 × 10–50 mm, margins deeply toothed, lobed, cleft, or divided, lobes indented to irregularly dissected. |
Peduncles | 1–70 mm. |
Involucres | campanulate to hemispheric. |
Ray florets | usually 8–14, rarely rudimentary or 0; corollas white, laminae oblong, 1–4(–6) × 1–3 mm. |
Disc florets | 40–100+; corollas yellow, tubes 0.7–1.3 mm, throats tubular to tubular-funnelform, 0.8–1.3 mm, lobes 0.1–0.2 mm. |
Phyllaries | 10–20, lanceolate or oblanceolate to ovate-lanceolate, 4–6 × 1–2 mm. |
Heads | borne singly or in corymbiform arrays, 4–10 × 4–10 mm. |
Cypselae | suboblong, oblanceolate, or subcuneate, (1.5–)2–3 mm, margins thin (not calloused), long- or short-ciliate; pappi 0 or of 1 antrorsely to retrorsely barbellate bristles 1–3 mm plus crowns of hyaline, laciniate scales. |
2n | = 65–72 or 100–116. |
Perityle emoryi |
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Phenology | Flowering year round (depending on latitude). |
Habitat | Coastal bluffs, desert plains, slopes, washes |
Elevation | 10–1500 m (0–4900 ft) |
Distribution |
AZ; CA; NV; UT; Mexico; South America (Chile, Peru)
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Discussion | Perityle emoryi is a widespread polyploid of diverse habitats and is often weedy. It is variable; none of the variation appears to have population significance and does not require taxonomic recognition. The range of P. emoryi appears to be gradually expanding. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 321. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Peritylinae > Perityle > sect. Perityle |
Sibling taxa | |
Name authority | Torrey: in W. H. Emory, Not. Milit. Reconn., 142. (1848) |
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