Townsendia rothrockii |
Townsendia formosa |
|
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Rothrock's Townsend daisy, Rothrock's townsendia |
smooth Townsend daisy |
|
Habit | Perennials, 1–3 cm (± pulvinate). | Biennials or perennials, 10–35(–75+) cm (usually rhizomatous and/or stoloniferous). |
Stems | ± erect; internodes 0.1–1+ mm, glabrous or ± strigose. |
erect; internodes (5–)10–15(–35) mm, strigillose. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. |
basal and cauline, blades spatulate to oblanceolate or lance-linear, 15–45(–75+) × 2–10(–20) mm, not fleshy (margins strigoso-ciliolate), glabrous or glabrate. |
Involucres | ± hemispheric, 12–28+ mm diam. |
± hemispheric or broader, 12–18+ mm diam. |
Ray florets | 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. |
20–34+; corollas usually white or pinkish adaxially (abaxially blue to lavender), laminae 10–15(–25+) mm, glabrous abaxially. |
Disc florets | 60–100+; corollas 3.5–4.5+ mm. |
80–150+; corollas 4 mm. |
Phyllaries | 40–60+ in (3–)4–5+ series, the longer obovate to oblanceolate, 7–9+ mm (l/w = 2.5–5), apices obtuse to acute, abaxial faces glabrous. |
30–45 in 4–6+ series, the longer obovate to lance-ovate or lanceolate, 10–12(–14) mm (l/w = 3–5), apices obtuse to acute (some or all hard, ± apiculate), abaxial faces sparsely strigillose or glabrous. |
Heads | ± sessile or on peduncles 5–25+ mm. |
at tips of stems (seldom surpassed by leaves). |
Cypselae | 4 mm, faces nearly glabrous (discs) or sparsely hairy (ray, hairs mostly at bases), hair tips glochidiform; pappi persistent; on ray cypselae 12–20 lanceolate to subulate scales 0.5–1.5 mm; on disc cypselae 15–30 subulate to setiform scales 3–6 mm. |
3–4(–5) mm, faces glabrous or ± stipitate-glandular, hair tips not forked or glochidiform; pappi persistent, each a bidentate corona 0.1–0.4(–0.8) mm. |
2n | = 36 (apomicts). |
= 18. |
Townsendia rothrockii |
Townsendia formosa |
|
Phenology | Flowering Aug. | Flowering Jul–Aug(–Sep). |
Habitat | South slopes | Meadows, yellow-pine forests |
Elevation | 3600–4000 m (11800–13100 ft) | 2400–2600 m (7900–8500 ft) |
Distribution |
CO
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AZ; NM |
Discussion | Of conservation concern. The types of Townsendia rothrockii and T. glabella may be conspecific. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 202. | FNA vol. 20, p. 197. |
Parent taxa | ||
Sibling taxa | ||
Name authority | A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) | Greene: Leafl. Bot. Observ. Crit. 1: 213. (1906) |
Web links |