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Wyoming Townsend daisy

Rothrock's Townsend daisy, Rothrock's townsendia

Habit Perennials, 1–2+ cm (± pulvinate). Perennials, 1–3 cm (± pulvinate).
Stems

± erect;

internodes 0.1–1+ mm, ± strigose.

± erect;

internodes 0.1–1+ mm, glabrous or ± strigose.

Leaves

basal and cauline, blades ± spatulate, 5–10(–15+) × 1.5–3+ mm, ± fleshy, faces sparsely strigose or glabrate.

basal and cauline, ± spatulate to oblanceolate, 10–35 × 2–7 mm, ± fleshy, faces sparsely strigose or glabrous.

Involucres

± campanulate, 6–10 mm diam.

± hemispheric, 12–28+ mm diam.

Ray florets

8–21;

corollas white or pinkish adaxially, laminae 4–8 mm, abaxially usually glabrous, sometimes sparsely glandular-puberulent.

18–40;

corollas blue to purplish adaxially, laminae 8–16 mm, glabrous abaxially.

Disc florets

20–40+;

corollas 3–4 mm.

60–100+;

corollas 3.5–4.5+ mm.

Phyllaries

20–28 in 3–4+ series, the longer ± lanceolate, 5–7 mm (l/w = 2.5–5), sometimes glabrate, apices obtuse to acute, abaxial faces usually ± strigillose.

40–60+ in (3–)4–5+ series, the longer obovate to oblanceolate, 7–9+ mm (l/w = 2.5–5), apices obtuse to acute, abaxial faces glabrous.

Heads

± sessile.

± sessile or on peduncles 5–25+ mm.

Cypselae

2–3.5 mm, faces hairy, hair tips entire or forked;

pappi persistent, 15–30 subulate to setiform scales 3–5 mm.

4 mm, faces nearly glabrous (discs) or sparsely hairy (ray, hairs mostly at bases), hair tips glochidiform;

pappi persistent;

on ray cypselae 12–20 lanceolate to subulate scales 0.5–1.5 mm;

on disc cypselae 15–30 subulate to setiform scales 3–6 mm.

2n

= 27 (apomicts).

= 36 (apomicts).

Townsendia minima

Townsendia rothrockii

Phenology Flowering Apr–Jun. Flowering Aug.
Habitat Rocky slopes, talus South slopes
Elevation 1800–3100 m (5900–10200 ft) 3600–4000 m (11800–13100 ft)
Distribution
from FNA
UT
[WildflowerSearch map]
[BONAP county map]
from FNA
CO
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

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

Of conservation concern.

The types of Townsendia rothrockii and T. glabella may be conspecific.

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

Source FNA vol. 20, p. 202. FNA vol. 20, p. 202.
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. microcephala, 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. scapigera, T. smithii, T. spathulata, T. strigosa, T. texensis
Synonyms T. alpigena var. minima
Name authority Eastwood: Leafl. W. Bot. 1: 206. (1936) A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879)
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