Townsendia incana |
Townsendia glabella |
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hoary Townsend daisy, hoary townsendia, silvery townsendia |
Gray's Townsend daisy |
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Habit | Perennials, (1–)2–8(–12+) cm. | Perennials, 1–5 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 spatulate to oblanceolate, 20–60+ × 2–5(–11+) mm, little, if at all, fleshy (margins strigoso-ciliate), usually glabrous, sometimes sparsely strigillose. |
Involucres | ± campanulate to hemispheric, (6–)10–15(–20) mm diam. |
hemispheric or broader, 8–12(–24) 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. |
12–34+; corollas usually white, sometimes pink or blue adaxially, laminae 5–10(–14+) mm, glabrous abaxially. |
Disc florets | 60–80+; corollas 4.5–6.5+ mm. |
50–80+; corollas 3.5–5.5 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. |
20–28+ in 3–4+ series, the longer ± lanceolate, 5–9 mm (l/w = 3–5), apices acute, abaxial faces glabrous or sparsely strigillose. |
Heads | at tips of stems (usually surpassed by leaves). |
usually on scapiform peduncles 10–20(–70) mm, rarely 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. |
2–4 mm, faces sparsely hairy (mostly at bases), hair tips glochidiform; pappi persistent; on ray cypselae ± 20 lanceolate to subulate scales 0.5–1.8 mm; on disc cypselae 15–35 subulate to setiform scales (4–)5–7 mm. |
2n | = 18. |
= 18. |
Townsendia incana |
Townsendia glabella |
|
Phenology | Flowering Apr–Jul. | Flowering May–Aug. |
Habitat | Sandy soils, rocky benches, shales, with pinyons and junipers | Shale slopes with pines |
Elevation | 1100–2200 m (3600–7200 ft) | 2100–2600 m (6900–8500 ft) |
Distribution |
AZ; CO; MT; NM; NV; UT; WY
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CO
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Discussion | Of conservation concern. Distinctions between Townsendia glabella and T. rothrockii are subtle. Types of the two names are probably better considered to be conspecific. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 20, p. 199. | FNA vol. 20, p. 203. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | T. arizonica | |
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 305. (1840) | A. Gray: Proc. Amer. Acad. Arts 16: 86. (1881) |
Web links |