Townsendia incana |
Townsendia hookeri |
|
---|---|---|
hoary Townsend daisy, hoary townsendia, silvery townsendia |
Hooker's Townsend daisy, Hooker's townsendia |
|
Habit | Perennials, (1–)2–8(–12+) cm. | Perennials, 1–3 cm (± pulvinate). |
Stems | decumbent to erect; internodes (0.5–)2–6(–12+) mm, usually densely piloso-hirsute, sometimes strigoso-scabrellous (surfaces usually hidden by hairs). |
± erect; internodes 0.1–1 mm, ± strigose. |
Leaves | basal and cauline, blades spatulate to narrowly oblanceolate, 3–12(–40+) × 1–2(–4+) mm, not fleshy, ± strigoso-scabrellous to strigillose. |
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 | ± campanulate to hemispheric, (6–)10–15(–20) mm diam. |
± campanulate, 8–18+ mm diam. |
Ray florets | (8–)13–34+; corollas white or pinkish adaxially, laminae 5–8(–12+) mm, abaxially usually glabrous, sometimes glandular-puberulent at bases. |
15–35; corollas white adaxially, laminae 8–12+ mm, glabrous abaxially. |
Disc florets | 60–80+; corollas 4.5–6.5+ mm. |
120–180+; corollas 4–5(–6+) mm. |
Phyllaries | 16–28+ in 3–4+ series, the longer ± lance-ovate to lanceolate, (6–)8–9(–12+) mm (l/w = 2.5–5), apices acute, abaxial faces 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 | at tips of stems (usually surpassed by leaves). |
± sessile. |
Cypselae | 3.5–4.5+ mm, faces hairy, hair tips glochidiform; pappi persistent; on ray cypselae 15–30 lanceolate or subulate to setiform scales 0.3–0.6 or 4–6+ mm; on disc cypselae 15–30+ subulate to setiform scales 4–6+ mm. |
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 incana |
Townsendia hookeri |
|
Phenology | Flowering Apr–Jul. | Flowering Mar–Jun. |
Habitat | Sandy soils, rocky benches, shales, with pinyons and junipers | Gravelly benches, sandy slopes |
Elevation | 1100–2200 m (3600–7200 ft) | 700–1800 m (2300–5900 ft) |
Distribution |
AZ; CO; MT; NM; NV; UT; WY
|
AK; CO; ID; MT; ND; NE; SD; UT; WY; AB; BC; SK; YT
|
Source | FNA vol. 20, p. 199. | FNA vol. 20, p. 200. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | T. arizonica | T. nuttallii |
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 305. (1840) | Beaman: Contr. Gray Herb. 183: 95, plates 17, 20, figs. 5, 6. (1957) |
Web links |