Townsendia annua |
Townsendia glabella |
|
---|---|---|
annual Easter daisy, annual Townsend daisy |
Gray's Townsend daisy |
|
Habit | Annuals, 3–12(–16+) cm. | Perennials, 1–5 cm (± pulvinate). |
Stems | decumbent to erect; internodes (1–)3–12(–18+) mm, strigose. |
± erect; internodes 0.1–1 mm, strigose. |
Leaves | mostly cauline, blades spatulate to narrowly oblanceolate, 8–12(–25+) × 1–3(–5+) mm, not fleshy, faces ± strigillose. |
basal and cauline, blades spatulate to oblanceolate, 20–60+ × 2–5(–11+) mm, little, if at all, fleshy (margins strigoso-ciliate), usually glabrous, sometimes sparsely strigillose. |
Involucres | ± hemispheric, 8–12(–16) mm diam. |
hemispheric or broader, 8–12(–24) mm diam. |
Ray florets | 12–30+; corollas white or pinkish to lavender adaxially, laminae 5–8+ mm, glabrous abaxially. |
12–34+; corollas usually white, sometimes pink or blue adaxially, laminae 5–10(–14+) mm, glabrous abaxially. |
Disc florets | 60–120+; corollas 2.5–3.5+ mm. |
50–80+; corollas 3.5–5.5 mm. |
Phyllaries | 26–30+ in 3+ series, the longer ± lance-ovate to oblanceolate, 5–6+ mm (l/w = 2.5–5), apices acute, abaxial faces strigillose to glabrate. |
20–28+ in 3–4+ series, the longer ± lanceolate, 5–9 mm (l/w = 3–5), apices acute, abaxial faces glabrous or sparsely strigillose. |
Heads | at tips of stems. |
usually on scapiform peduncles 10–20(–70) mm, rarely sessile. |
Cypselae | 2–3 mm, faces hairy, hair tips glochidiform; pappi persistent; on ray cypselae ± 10 lanceolate scales 0.2–0.5(–1) mm; on disc cypselae 20+ subulate scales 1–2.5(–4) mm. |
2–4 mm, faces sparsely hairy (mostly at bases), hair tips glochidiform; pappi persistent; on ray cypselae ± 20 lanceolate to subulate scales 0.5–1.8 mm; on disc cypselae 15–35 subulate to setiform scales (4–)5–7 mm. |
2n | = 18. |
= 18. |
Townsendia annua |
Townsendia glabella |
|
Phenology | Flowering Apr–Jun(–Oct). | Flowering May–Aug. |
Habitat | Sandy soils, alkaline flats, red clays | Shale slopes with pines |
Elevation | 1200–2100 m (3900–6900 ft) | 2100–2600 m (6900–8500 ft) |
Distribution |
AZ; CO; NM; TX; UT; WY
|
CO
|
Discussion | The type of Townsendia annua may prove to be conspecific with that of T. strigosa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Distinctions between Townsendia glabella and T. rothrockii are subtle. Types of the two names are probably better considered to be conspecific. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 198. | FNA vol. 20, p. 203. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Beaman: Contr. Gray Herb. 183: 132, plate 22, fig. 4. (1957) | A. Gray: Proc. Amer. Acad. Arts 16: 86. (1881) |
Web links |