Townsendia rothrockii |
Townsendia scapigera |
|
---|---|---|
Rothrock's Townsend daisy, Rothrock's townsendia |
ground townsendia, tuft Townsend daisy, tuft townsendia |
|
Habit | Perennials, 1–3 cm (± pulvinate). | |
Stems | ± erect; internodes 0.1–1+ mm, glabrous or ± strigose. |
± erect; internodes 0.1–1 mm, ± strigose. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous. |
basal and cauline, blades ± spatulate to oblanceolate, 15–30(–70) × 2–5(–9) mm, not fleshy, faces ± strigose. |
Involucres | ± hemispheric, 12–28+ mm diam. |
± campanulate, 12–20(–32) mm diam. |
Ray florets | 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. |
18–35; corollas white adaxially, laminae 7–16 mm, glandular-puberulent abaxially. |
Disc florets | 60–100+; corollas 3.5–4.5+ mm. |
40–100+; corollas 3.5–5.5 mm. |
Phyllaries | 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. |
16–32+ in 3–4+ series, the longer ± lanceolate, (7–)9–13 mm (l/w = 3–5), apices acute, abaxial faces piloso-strigose to strigose. |
Heads | ± sessile or on peduncles 5–25+ mm. |
on scapiform peduncles 30–60(–120) mm. |
Cypselae | 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. |
4–5.5 mm, faces hairy, hair tips forked or entire; pappi persistent; on ray cypselae 20–30+ subulate to setiform scales 3–6+ mm; on disc cypselae 20–30 subulate to setiform scales 5–7+ mm. |
2n | = 36 (apomicts). |
|
Townsendia rothrockii |
Townsendia scapigera |
|
Phenology | Flowering Aug. | Flowering May–Jul(–Aug). |
Habitat | South slopes | Openings in sagebrush |
Elevation | 3600–4000 m (11800–13100 ft) | 1400–3400 m (4600–11200 ft) |
Distribution |
CO
|
CA; ID; NV; OR; UT
|
Discussion | Of conservation concern. The types of Townsendia rothrockii and T. glabella may be conspecific. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Plants that key here and have peduncles 5–15+ mm (sporting smaller heads, fewer ray florets, and smaller cypselae than are characteristic of Townsendia scapigera) may belong to T. jonesii (which see). Plants included here in T. scapigera from Sweetwater Mountains, California, with relatively large heads and high numbers of florets were identified on their labels (e.g., DeDecker 3928, RSA) as T. parryi, a species not known to occur in California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 202. | FNA vol. 20, p. 201. |
Parent taxa | Asteraceae > tribe Astereae > Townsendia | Asteraceae > tribe Astereae > Townsendia |
Sibling taxa | ||
Name authority | A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) | D. C. Eaton: in S. Watson, Botany (Fortieth Parallel), 145, plate 17, figs. 1–7. (1871) |
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