Townsendia florifera |
Townsendia rothrockii |
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Rothrock's Townsend daisy, Rothrock's townsendia |
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Habit | Biennials (perhaps flowering first year, sometimes persisting), 3–12(–15+) cm. | Perennials, 1–3 cm (± pulvinate). |
Stems | decumbent to erect; internodes 3–12(–15+) mm, piloso-strigose. |
± erect; internodes 0.1–1+ mm, glabrous or ± strigose. |
Leaves | basal and cauline, blades spatulate to linear, 10–25(–50+) × 2–3(–8+) mm, not fleshy, faces ± strigose. |
basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. |
Involucres | ± hemispheric or broader, 16–20(–30) mm diam. |
± hemispheric, 12–28+ mm diam. |
Ray florets | 13–34+; corollas white or pinkish adaxially, laminae (8–)10–18+ mm, abaxially usually glandular-puberulent, rarely glabrous. |
18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. |
Disc florets | (80–)100–150+; corollas (4–)5.5–6+ mm. |
60–100+; corollas 3.5–4.5+ mm. |
Phyllaries | 24–30+ in 3–4+ series, the longer ± lanceolate, (6–)9–11+ mm (l/w = 2.5–5), apices acute, abaxial faces strigose. |
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. |
Heads | at tips of stems. |
± sessile or on peduncles 5–25+ mm. |
Cypselae | (3.5–)4–5+ mm, faces hairy, hair tips entire or forked; pappi persistent; on ray cypselae 20–30 subulate to setiform scales 2–6 mm; on disc cypselae 20–30+ subulate to setiform scales (4–)5–7+ mm. |
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. |
2n | = 18. |
= 36 (apomicts). |
Townsendia florifera |
Townsendia rothrockii |
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Phenology | Flowering Apr–Jun(–Aug). | Flowering Aug. |
Habitat | Gravelly flats with junipers and sagebrush | South slopes |
Elevation | 400–2300 m (1300–7500 ft) | 3600–4000 m (11800–13100 ft) |
Distribution |
ID; MT; NV; OR; UT; WA; WY |
CO
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Discussion | J. H. Beaman (1957) considered plants intermediate between Townsendia florifera and T. parryi to be hybrids. Such intermediates occur in Montana (e.g., Jones in 1905 from Gallatin Co. and Suksdorf 282 from Park Co.), outside the known distribution of T. florifera. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. The types of Townsendia rothrockii and T. glabella may be conspecific. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 198. | FNA vol. 20, p. 202. |
Parent taxa | Asteraceae > tribe Astereae > Townsendia | Asteraceae > tribe Astereae > Townsendia |
Sibling taxa | ||
Synonyms | Erigeron florifer, T. florifera var. watsonii | |
Name authority | (Hooker) A. Gray: Proc. Amer. Acad. Arts 16: 84. (1880) | A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) |
Web links |