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smallhead Townsend daisy

Hooker's Townsend daisy, Hooker's townsendia

Habit Perennials, 1–3 cm (usually ± pulvinate). Perennials, 1–3 cm (± pulvinate).
Stems

± erect;

internodes 0.1–1 mm, ± villous.

± erect;

internodes 0.1–1 mm, ± strigose.

Leaves

basal and cauline, ± spatulate to oblanceolate, 3–8(–18) × 1–2.5 mm (not fleshy), faces ± villous.

basal and cauline, blades narrowly oblanceolate to linear, 5–25(–40+) × 1–1.5(–3) mm, fleshy, faces ± strigoso-sericeous, little, if at all.

Involucres

± campanulate, 4–8 mm diam.

± campanulate, 8–18+ mm diam.

Ray florets

13–17;

corollas white adaxially, laminae 5–8 mm, glabrous abaxially.

15–35;

corollas white adaxially, laminae 8–12+ mm, glabrous abaxially.

Disc florets

number unknown;

corollas 4 mm.

120–180+;

corollas 4–5(–6+) 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.

50–65+ in 5+ series, the longer ± lance-linear, 7–11(–13) mm (l/w = 6–9), apices attenuate, abaxial faces sparsely strigose or glabrate.

Heads

± sessile.

± sessile.

Cypselae

3–4 mm, faces glabrous or glabrate;

pappi readily falling, of 15–20 subulate to setiform scales 3–5 mm (± connate basally).

3.5–4.5 mm, faces hairy, hair tips glochidiform;

pappi persistent;

on ray cypselae ca. 30 subulate to setiform scales (1–)5–7 mm;

on disc cypselae ca. 30 subulate to setiform scales 5.5–7.5+ mm.

2n

= 18.

Townsendia microcephala

Townsendia hookeri

Phenology Flowering Jul. Flowering Mar–Jun.
Habitat Rocky slopes Gravelly benches, sandy slopes
Elevation 2600 m (8500 ft) 700–1800 m (2300–5900 ft)
Distribution
from FNA
WY
[BONAP county map]
from FNA
AK; CO; ID; MT; ND; NE; SD; UT; WY; AB; BC; SK; YT
[WildflowerSearch map]
[BONAP county map]
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.)

Source FNA vol. 20, p. 196. FNA vol. 20, p. 200.
Parent taxa Asteraceae > tribe Astereae > Townsendia Asteraceae > tribe Astereae > Townsendia
Sibling taxa
T. annua, 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. 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. formosa, T. glabella, T. grandiflora, T. gypsophila, 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
Synonyms T. nuttallii
Name authority Dorn: Madroño 39: 189, fig. 1. (1992) Beaman: Contr. Gray Herb. 183: 95, plates 17, 20, figs. 5, 6. (1957)
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