Townsendia rothrockii |
Townsendia jonesii |
|
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Rothrock's Townsend daisy, Rothrock's townsendia |
Jones' Townsend daisy, Jones' townsendia |
|
Habit | Perennials, 1–3 cm (± pulvinate). | Perennials, 1–2(–4) cm (usually ± pulvinate). |
Stems | ± erect; internodes 0.1–1+ mm, glabrous or ± strigose. |
± erect; internodes 0.1–1 mm, ± scabrellous to 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, 7–15(–35+) × 1–2(–4+) mm, not fleshy, faces ± scabrellous to strigose. |
Involucres | ± hemispheric, 12–28+ mm diam. |
± campanulate, 8–14 mm diam. |
Ray florets | 18–40; corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially. |
13–21; corollas white adaxially, laminae 5–7+ mm, ± densely glandular-puberulent abaxially. |
Disc florets | 60–100+; corollas 3.5–4.5+ mm. |
40–80+; corollas 4.5–5+ 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. |
20–28 in 3–4+ series, the longer ± lanceolate, 4–8 mm (l/w = 2.5–5), sometimes glabrate, apices acute, abaxial faces usually sparsely strigillose. |
Heads | ± sessile or on peduncles 5–25+ mm. |
usually ± sessile, sometimes on scapiform peduncles 5–15+ 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. |
2–3(–4+) mm, faces hairy, hair tips glochidiform or forked; pappi persistent; on ray cypselae 20–24 subulate to setiform scales 3–4+ mm; on disc cypselae 20–24 subulate to setiform scales 4–6(–8) mm. |
2n | = 36 (apomicts). |
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Townsendia rothrockii |
Townsendia jonesii |
|
Phenology | Flowering Aug. | Flowering Apr–Jun. |
Habitat | South slopes | Rocky slopes, limestone slopes with pinyons |
Elevation | 3600–4000 m (11800–13100 ft) | 2100–3000 m (6900–9800 ft) |
Distribution |
CO
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AZ; NV; UT
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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.) |
The current circumscription of Townsendia jonesii is, perhaps, too lumpy. Some lumps might be better treated as distinct species and/or included within the circum-scription of T. scapigera. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 202. | FNA vol. 20, p. 202. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | T. mensana var. jonesii | |
Name authority | A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) | (Beaman) Reveal: Great Basin Naturalist 30: 35. (1970) |
Web links |