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annual Easter daisy, annual Townsend daisy

smooth Townsend daisy

Habit Annuals, 3–12(–16+) cm. Biennials or perennials, 10–35(–75+) cm (usually rhizomatous and/or stoloniferous).
Stems

decumbent to erect;

internodes (1–)3–12(–18+) mm, strigose.

erect;

internodes (5–)10–15(–35) mm, strigillose.

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 or lance-linear, 15–45(–75+) × 2–10(–20) mm, not fleshy (margins strigoso-ciliolate), glabrous or glabrate.

Involucres

± hemispheric, 8–12(–16) mm diam.

± hemispheric or broader, 12–18+ mm diam.

Ray florets

12–30+;

corollas white or pinkish to lavender adaxially, laminae 5–8+ mm, glabrous abaxially.

20–34+;

corollas usually white or pinkish adaxially (abaxially blue to lavender), laminae 10–15(–25+) mm, glabrous abaxially.

Disc florets

60–120+;

corollas 2.5–3.5+ mm.

80–150+;

corollas 4 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.

30–45 in 4–6+ series, the longer obovate to lance-ovate or lanceolate, 10–12(–14) mm (l/w = 3–5), apices obtuse to acute (some or all hard, ± apiculate), abaxial faces sparsely strigillose or glabrous.

Heads

at tips of stems.

at tips of stems (seldom surpassed by leaves).

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.

3–4(–5) mm, faces glabrous or ± stipitate-glandular, hair tips not forked or glochidiform;

pappi persistent, each a bidentate corona 0.1–0.4(–0.8) mm.

2n

= 18.

= 18.

Townsendia annua

Townsendia formosa

Phenology Flowering Apr–Jun(–Oct). Flowering Jul–Aug(–Sep).
Habitat Sandy soils, alkaline flats, red clays Meadows, yellow-pine forests
Elevation 1200–2100 m (3900–6900 ft) 2400–2600 m (7900–8500 ft)
Distribution
from FNA
AZ; CO; NM; TX; UT; WY
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM
[BONAP county map]
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.)

Source FNA vol. 20, p. 198. FNA vol. 20, p. 197.
Parent taxa Asteraceae > tribe Astereae > Townsendia Asteraceae > tribe Astereae > Townsendia
Sibling taxa
T. aprica, T. condensata, T. eximia, T. exscapa, T. fendleri, T. florifera, T. formosa, T. glabella, T. grandiflora, T. gypsophila, T. hookeri, T. incana, T. jonesii, T. leptotes, T. mensana, T. microcephala, T. minima, T. montana, T. parryi, T. rothrockii, T. scapigera, T. smithii, T. spathulata, T. strigosa, T. texensis
T. annua, T. aprica, T. condensata, T. eximia, T. exscapa, T. fendleri, T. florifera, T. glabella, T. grandiflora, T. gypsophila, T. hookeri, T. incana, T. jonesii, T. leptotes, T. mensana, T. microcephala, T. minima, T. montana, T. parryi, T. rothrockii, T. scapigera, T. smithii, T. spathulata, T. strigosa, T. texensis
Name authority Beaman: Contr. Gray Herb. 183: 132, plate 22, fig. 4. (1957) Greene: Leafl. Bot. Observ. Crit. 1: 213. (1906)
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