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Rothrock's Townsend daisy, Rothrock's townsendia

Jones' Townsend daisy, Jones' townsendia

Habit Perennials, 1–3 cm (± pulvinate). Perennials, 1–2(–4) cm (usually ± pulvinate).
Stems

± erect;

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

± erect;

internodes 0.1–1 mm, ± scabrellous to strigose.

Leaves

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

basal and cauline, blades ± spatulate to oblanceolate, 7–15(–35+) × 1–2(–4+) mm, not fleshy, faces ± scabrellous to strigose.

Involucres

± hemispheric, 12–28+ mm diam.

± campanulate, 8–14 mm diam.

Ray florets

18–40;

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

13–21;

corollas white adaxially, laminae 5–7+ mm, ± densely glandular-puberulent abaxially.

Disc florets

60–100+;

corollas 3.5–4.5+ mm.

40–80+;

corollas 4.5–5+ mm.

Phyllaries

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.

20–28 in 3–4+ series, the longer ± lanceolate, 4–8 mm (l/w = 2.5–5), sometimes glabrate, apices acute, abaxial faces usually sparsely strigillose.

Heads

± sessile or on peduncles 5–25+ mm.

usually ± sessile, sometimes on scapiform peduncles 5–15+ mm.

Cypselae

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.

2–3(–4+) mm, faces hairy, hair tips glochidiform or forked;

pappi persistent;

on ray cypselae 20–24 subulate to setiform scales 3–4+ mm;

on disc cypselae 20–24 subulate to setiform scales 4–6(–8) mm.

2n

= 36 (apomicts).

Townsendia rothrockii

Townsendia jonesii

Phenology Flowering Aug. Flowering Apr–Jun.
Habitat South slopes Rocky slopes, limestone slopes with pinyons
Elevation 3600–4000 m (11800–13100 ft) 2100–3000 m (6900–9800 ft)
Distribution
from FNA
CO
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NV; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

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

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

The current circumscription of Townsendia jonesii is, perhaps, too lumpy. Some lumps might be better treated as distinct species and/or included within the circum-scription of T. scapigera.

(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. minima, T. montana, T. parryi, 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. 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. mensana var. jonesii
Name authority A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) (Beaman) Reveal: Great Basin Naturalist 30: 35. (1970)
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