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Hooker's Townsend daisy, Hooker's townsendia

ground townsendia, tuft Townsend daisy, tuft townsendia

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

± erect;

internodes 0.1–1 mm, ± strigose.

± erect;

internodes 0.1–1 mm, ± strigose.

Leaves

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

basal and cauline, blades ± spatulate to oblanceolate, 15–30(–70) × 2–5(–9) mm, not fleshy, faces ± strigose.

Involucres

± campanulate, 8–18+ mm diam.

± campanulate, 12–20(–32) mm diam.

Ray florets

15–35;

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

18–35;

corollas white adaxially, laminae 7–16 mm, glandular-puberulent abaxially.

Disc florets

120–180+;

corollas 4–5(–6+) mm.

40–100+;

corollas 3.5–5.5 mm.

Phyllaries

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.

16–32+ in 3–4+ series, the longer ± lanceolate, (7–)9–13 mm (l/w = 3–5), apices acute, abaxial faces piloso-strigose to strigose.

Heads

± sessile.

on scapiform peduncles 30–60(–120) mm.

Cypselae

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.

4–5.5 mm, faces hairy, hair tips forked or entire;

pappi persistent;

on ray cypselae 20–30+ subulate to setiform scales 3–6+ mm;

on disc cypselae 20–30 subulate to setiform scales 5–7+ mm.

2n

= 18.

Townsendia hookeri

Townsendia scapigera

Phenology Flowering Mar–Jun. Flowering May–Jul(–Aug).
Habitat Gravelly benches, sandy slopes Openings in sagebrush
Elevation 700–1800 m (2300–5900 ft) 1400–3400 m (4600–11200 ft)
Distribution
from FNA
AK; CO; ID; MT; ND; NE; SD; UT; WY; AB; BC; SK; YT
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; ID; NV; OR; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Plants that key here and have peduncles 5–15+ mm (sporting smaller heads, fewer ray florets, and smaller cypselae than are characteristic of Townsendia scapigera) may belong to T. jonesii (which see). Plants included here in T. scapigera from Sweetwater Mountains, California, with relatively large heads and high numbers of florets were identified on their labels (e.g., DeDecker 3928, RSA) as T. parryi, a species not known to occur in California.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 20, p. 200. FNA vol. 20, p. 201.
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. 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. 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. smithii, T. spathulata, T. strigosa, T. texensis
Synonyms T. nuttallii
Name authority Beaman: Contr. Gray Herb. 183: 95, plates 17, 20, figs. 5, 6. (1957) D. C. Eaton: in S. Watson, Botany (Fortieth Parallel), 145, plate 17, figs. 1–7. (1871)
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