Townsendia rothrockii |
Townsendia smithii |
|
---|---|---|
Rothrock's Townsend daisy, Rothrock's townsendia |
Black Rock Townsend daisy |
|
Habit | Perennials, 1–3 cm (± pulvinate). | Perennials, 3–8(–12+) cm (usually ± pulvinate). |
Stems | ± erect; internodes 0.1–1+ mm, glabrous or ± strigose. |
± erect; internodes 0.1–1 mm, ± scabrellous. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. |
basal and cauline, ± spatulate to oblanceolate, 15–50(–80) × 2–6(–11) mm, little, if at all, fleshy, faces ± scabrellous. |
Involucres | ± hemispheric, 12–28+ mm diam. |
± hemispheric to campanulate, 10–15 mm diam. |
Ray florets | 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. |
12–21; corollas white adaxially, laminae 6–12+ mm, glabrous abaxially. |
Disc florets | 60–100+; corollas 3.5–4.5+ mm. |
60–80+; corollas 3.5–5 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. |
14–26 in 2–3+ series, the longer lance-ovate to lanceolate, 9–11 mm (l/w = 3–5), apices attenuate, abaxial faces piloso-strigose to strigose. |
Heads | ± sessile or on peduncles 5–25+ mm. |
on scapiform peduncles 30–80(–120) 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. |
2.5–3.5 mm, faces hairy, hair tips entire; pappi persistent, 16–20+ lanceolate to subulate scales 0.2–0.8 mm (± connate). |
2n | = 36 (apomicts). |
= 18. |
Townsendia rothrockii |
Townsendia smithii |
|
Phenology | Flowering Aug. | Flowering May. |
Habitat | South slopes | Volcanic soils, pinyon or yellow pines |
Elevation | 3600–4000 m (11800–13100 ft) | 2000–2400 m (6600–7900 ft) |
Distribution |
CO
|
AZ |
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. 202. |
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) | L. M. Shultz & A. H. Holmgren: Brittonia 32: 144, fig. 1. (1980) |
Web links |