Townsendia hookeri |
Townsendia scapigera |
|
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Hooker's Townsend daisy, Hooker's townsendia |
ground townsendia, tuft Townsend daisy, tuft townsendia |
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Habit | Perennials, 1–3 cm (± pulvinate). | |
Stems | ± erect; internodes 0.1–1 mm, ± strigose. |
± erect; internodes 0.1–1 mm, ± strigose. |
Leaves | basal and cauline, blades narrowly oblanceolate to linear, 5–25(–40+) × 1–1.5(–3) mm, fleshy, faces ± strigoso-sericeous, little, if at all. |
basal and cauline, blades ± spatulate to oblanceolate, 15–30(–70) × 2–5(–9) mm, not fleshy, faces ± strigose. |
Involucres | ± campanulate, 8–18+ mm diam. |
± campanulate, 12–20(–32) mm diam. |
Ray florets | 15–35; corollas white adaxially, laminae 8–12+ mm, glabrous abaxially. |
18–35; corollas white adaxially, laminae 7–16 mm, glandular-puberulent abaxially. |
Disc florets | 120–180+; corollas 4–5(–6+) mm. |
40–100+; corollas 3.5–5.5 mm. |
Phyllaries | 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. |
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. |
on scapiform peduncles 30–60(–120) mm. |
Cypselae | 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. |
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 | = 18. |
|
Townsendia hookeri |
Townsendia scapigera |
|
Phenology | Flowering Mar–Jun. | Flowering May–Jul(–Aug). |
Habitat | Gravelly benches, sandy slopes | Openings in sagebrush |
Elevation | 700–1800 m (2300–5900 ft) | 1400–3400 m (4600–11200 ft) |
Distribution |
AK; CO; ID; MT; ND; NE; SD; UT; WY; AB; BC; SK; YT
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CA; ID; NV; OR; UT
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Discussion | 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. 200. | FNA vol. 20, p. 201. |
Parent taxa | Asteraceae > tribe Astereae > Townsendia | Asteraceae > tribe Astereae > Townsendia |
Sibling taxa | ||
Synonyms | T. nuttallii | |
Name authority | Beaman: Contr. Gray Herb. 183: 95, plates 17, 20, figs. 5, 6. (1957) | D. C. Eaton: in S. Watson, Botany (Fortieth Parallel), 145, plate 17, figs. 1–7. (1871) |
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