Townsendia rothrockii |
Townsendia mensana |
|
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Rothrock's Townsend daisy, Rothrock's townsendia |
table Townsend daisy |
|
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, ± pilose. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. |
basal and cauline, blades narrowly oblanceolate to lance-linear, 5–40+ × 0.6–2.5+ mm, not fleshy, faces ± strigoso-sericeous to strigose. |
Involucres | ± hemispheric, 12–28+ mm diam. |
± campanulate, 7–10 mm diam. |
Ray florets | 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. |
13–21+; corollas white adaxially, laminae 4–8+ mm, glandular-puberulent abaxially. |
Disc florets | 60–100+; corollas 3.5–4.5+ mm. |
40–60+; corollas (3.5–)4.5–6 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. |
25–50+ in 4–5+ series, the longer narrowly lanceolate, 6–8+ mm (l/w = 5–6), apices acute, abaxial faces sparsely strigillose or glabrate. |
Heads | ± sessile or on peduncles 5–25+ mm. |
± sessile. |
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. |
3–3.5 mm, faces hairy, hair tips glochidiform; pappi persistent; on ray cypselae 15–35 subulate to setiform scales 0.5–1.5 or 4–5 mm; on disc cypselae 15–35 subulate to setiform scales 4–6.5 mm. |
2n | = 36 (apomicts). |
|
Townsendia rothrockii |
Townsendia mensana |
|
Phenology | Flowering Aug. | Flowering May. |
Habitat | South slopes | Openings with junipers and pinyons |
Elevation | 3600–4000 m (11800–13100 ft) | 1700–2700 m (5600–8900 ft) |
Distribution |
CO
|
UT |
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.) |
Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 202. | FNA vol. 20, p. 201. |
Parent taxa | Asteraceae > tribe Astereae > Townsendia | Asteraceae > tribe Astereae > Townsendia |
Sibling taxa | ||
Name authority | A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) | M. E. Jones: Contr. W. Bot. 13: 15. (1910) |
Web links |