Townsendia smithii |
Townsendia hookeri |
|
---|---|---|
Black Rock Townsend daisy |
Hooker's Townsend daisy, Hooker's townsendia |
|
Habit | Perennials, 3–8(–12+) cm (usually ± pulvinate). | Perennials, 1–3 cm (± pulvinate). |
Stems | ± erect; internodes 0.1–1 mm, ± scabrellous. |
± erect; internodes 0.1–1 mm, ± strigose. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 15–50(–80) × 2–6(–11) mm, little, if at all, fleshy, faces ± scabrellous. |
basal and cauline, blades narrowly oblanceolate to linear, 5–25(–40+) × 1–1.5(–3) mm, fleshy, faces ± strigoso-sericeous, little, if at all. |
Involucres | ± hemispheric to campanulate, 10–15 mm diam. |
± campanulate, 8–18+ mm diam. |
Ray florets | 12–21; corollas white adaxially, laminae 6–12+ mm, glabrous abaxially. |
15–35; corollas white adaxially, laminae 8–12+ mm, glabrous abaxially. |
Disc florets | 60–80+; corollas 3.5–5 mm. |
120–180+; corollas 4–5(–6+) mm. |
Phyllaries | 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. |
50–65+ in 5+ series, the longer ± lance-linear, 7–11(–13) mm (l/w = 6–9), apices attenuate, abaxial faces sparsely strigose or glabrate. |
Heads | on scapiform peduncles 30–80(–120) mm. |
± sessile. |
Cypselae | 2.5–3.5 mm, faces hairy, hair tips entire; pappi persistent, 16–20+ lanceolate to subulate scales 0.2–0.8 mm (± connate). |
3.5–4.5 mm, faces hairy, hair tips glochidiform; pappi persistent; on ray cypselae ca. 30 subulate to setiform scales (1–)5–7 mm; on disc cypselae ca. 30 subulate to setiform scales 5.5–7.5+ mm. |
2n | = 18. |
= 18. |
Townsendia smithii |
Townsendia hookeri |
|
Phenology | Flowering May. | Flowering Mar–Jun. |
Habitat | Volcanic soils, pinyon or yellow pines | Gravelly benches, sandy slopes |
Elevation | 2000–2400 m (6600–7900 ft) | 700–1800 m (2300–5900 ft) |
Distribution |
AZ |
AK; CO; ID; MT; ND; NE; SD; UT; WY; AB; BC; SK; YT
|
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 202. | FNA vol. 20, p. 200. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | T. nuttallii | |
Name authority | L. M. Shultz & A. H. Holmgren: Brittonia 32: 144, fig. 1. (1980) | Beaman: Contr. Gray Herb. 183: 95, plates 17, 20, figs. 5, 6. (1957) |
Web links |