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annual Easter daisy, annual Townsend daisy

Habit Annuals, 3–12(–16+) cm.
Stems

decumbent to erect;

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

Leaves

mostly cauline, blades spatulate to narrowly oblanceolate, 8–12(–25+) × 1–3(–5+) mm, not fleshy, faces ± strigillose.

Involucres

± hemispheric, 8–12(–16) mm diam.

Ray florets

12–30+;

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

Disc florets

60–120+;

corollas 2.5–3.5+ 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.

Heads

at tips of stems.

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.

2n

= 18.

Townsendia annua

Phenology Flowering Apr–Jun(–Oct).
Habitat Sandy soils, alkaline flats, red clays
Elevation 1200–2100 m (3900–6900 ft)
Distribution
from FNA
AZ; CO; NM; TX; UT; WY
[WildflowerSearch map]
[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.
Parent taxa 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
Name authority Beaman: Contr. Gray Herb. 183: 132, plate 22, fig. 4. (1957)
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