Townsendia smithii |
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Black Rock Townsend daisy |
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Habit | Perennials, 3–8(–12+) cm (usually ± pulvinate). |
Stems | ± erect; internodes 0.1–1 mm, ± scabrellous. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 15–50(–80) × 2–6(–11) mm, little, if at all, fleshy, faces ± scabrellous. |
Involucres | ± hemispheric to campanulate, 10–15 mm diam. |
Ray florets | 12–21; corollas white adaxially, laminae 6–12+ mm, glabrous abaxially. |
Disc florets | 60–80+; corollas 3.5–5 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. |
Heads | on scapiform peduncles 30–80(–120) mm. |
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). |
2n | = 18. |
Townsendia smithii |
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Phenology | Flowering May. |
Habitat | Volcanic soils, pinyon or yellow pines |
Elevation | 2000–2400 m (6600–7900 ft) |
Distribution |
AZ |
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 202. |
Parent taxa | |
Sibling taxa | |
Name authority | L. M. Shultz & A. H. Holmgren: Brittonia 32: 144, fig. 1. (1980) |
Web links |