Townsendia rothrockii |
Townsendia leptotes |
|
---|---|---|
Rothrock's Townsend daisy, Rothrock's townsendia |
common Townsend daisy, common townsendia, slender townsendia |
|
Habit | Perennials, 1–3 cm (± pulvinate). | Perennials, 1–3 cm (± pulvinate). |
Stems | ± erect; internodes 0.1–1+ mm, glabrous or ± strigose. |
± erect; internodes 0.1–1 mm, strigose. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. |
basal and cauline, blades spatulate to narrowly obovate, (8–)12–25(–40+) × 1–2(–3+) mm, ± fleshy, faces ± strigose to strigillose or glabrate. |
Involucres | ± hemispheric, 12–28+ mm diam. |
± campanulate, 8–12(–20+) mm diam. |
Ray florets | 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. |
13–34+; corollas usually white or pinkish, seldom blue, adaxially, laminae 5–7(–12+) mm, abaxially usually glabrous, sometimes sparsely glandular-puberulent. |
Disc florets | 60–100+; corollas 3.5–4.5+ mm. |
40–80+; corollas 4–6+ 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. |
40–50+ in 4–5+ series, the longer ± lanceolate, 7–9(–12) mm (l/w = 2.5–5), apices acute to attenuate, abaxial faces sparsely strigose or glabrous. |
Heads | ± sessile or on peduncles 5–25+ mm. |
usually ± sessile, rarely on scapiform peduncles 5–15+ mm. |
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+ mm, faces glabrous or sparsely hairy (hairs mostly at bases), hair tips glochidiform; pappi persistent; on ray cypselae ca. 25 lanceolate or subulate to setiform scales 0–1 or 5–8 mm; on disc cypselae ca. 30 subulate to setiform scales 5–8 mm. |
2n | = 36 (apomicts). |
= 18. |
Townsendia rothrockii |
Townsendia leptotes |
|
Phenology | Flowering Aug. | Flowering Jun–Jul. |
Habitat | South slopes | Rocky ridges, sandy slopes |
Elevation | 3600–4000 m (11800–13100 ft) | (2300–)2900–3800 m ((7500–)9500–12500 ft) |
Distribution |
CO
|
CA; CO; ID; MT; NM; NV; UT; WY
|
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. 203. |
Parent taxa | Asteraceae > tribe Astereae > Townsendia | Asteraceae > tribe Astereae > Townsendia |
Sibling taxa | ||
Synonyms | T. sericea var. leptotes | |
Name authority | A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) | (A. Gray) Osterhout: Muhlenbergia 4: 69. (1908) |
Web links |