Townsendia microcephala |
Townsendia annua |
|
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smallhead Townsend daisy |
annual Easter daisy, annual Townsend daisy |
|
Habit | Perennials, 1–3 cm (usually ± pulvinate). | Annuals, 3–12(–16+) cm. |
Stems | ± erect; internodes 0.1–1 mm, ± villous. |
decumbent to erect; internodes (1–)3–12(–18+) mm, strigose. |
Leaves | basal and cauline, ± spatulate to oblanceolate, 3–8(–18) × 1–2.5 mm (not fleshy), faces ± villous. |
mostly cauline, blades spatulate to narrowly oblanceolate, 8–12(–25+) × 1–3(–5+) mm, not fleshy, faces ± strigillose. |
Involucres | ± campanulate, 4–8 mm diam. |
± hemispheric, 8–12(–16) mm diam. |
Ray florets | 13–17; corollas white adaxially, laminae 5–8 mm, glabrous abaxially. |
12–30+; corollas white or pinkish to lavender adaxially, laminae 5–8+ mm, glabrous abaxially. |
Disc florets | number unknown; corollas 4 mm. |
60–120+; corollas 2.5–3.5+ mm. |
Phyllaries | ca. 26 in 3–4 series, the longer ± lanceolate, 5–8 mm (l/w = 3–5), apices acute, abaxial faces ± strigose to villous. |
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. |
Heads | ± sessile. |
at tips of stems. |
Cypselae | 3–4 mm, faces glabrous or glabrate; pappi readily falling, of 15–20 subulate to setiform scales 3–5 mm (± connate basally). |
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. |
2n | = 18. |
|
Townsendia microcephala |
Townsendia annua |
|
Phenology | Flowering Jul. | Flowering Apr–Jun(–Oct). |
Habitat | Rocky slopes | Sandy soils, alkaline flats, red clays |
Elevation | 2600 m (8500 ft) | 1200–2100 m (3900–6900 ft) |
Distribution |
WY |
AZ; CO; NM; TX; UT; WY
|
Discussion | Of conservation concern. The type of Townsendia microcephala may prove to be conspecific with that of T. spathulata. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 20, p. 196. | FNA vol. 20, p. 198. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Dorn: Madroño 39: 189, fig. 1. (1992) | Beaman: Contr. Gray Herb. 183: 132, plate 22, fig. 4. (1957) |
Web links |