The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Rothrock's Townsend daisy, Rothrock's townsendia

gypsum-lovingtownsend daisy

Habit Perennials, 1–3 cm (± pulvinate). Perennials, 2–10 cm (± pulvinate to dendroid).
Stems

± erect;

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

± erect;

inter- nodes 0.1–1+ mm, densely piloso-hirsute to hispidulous (surfaces usually hidden by hairs).

Leaves

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

basal and cauline, blades ± spatulate or oblanceolate to linear, 4–9(–25) × 1–2(–3) mm, ± fleshy, ± strigose.

Involucres

± hemispheric, 12–28+ mm diam.

± hemispheric to campanulate, 3–6 mm diam.

Ray florets

18–40;

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

(4–)12–16;

corollas white or pinkish adaxially, laminae 3–5+ mm, glabrous abaxially.

Disc florets

60–100+;

corollas 3.5–4.5+ mm.

40–60;

corollas 2.5–3+ 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.

22–26 in 3–4+ series, the longer ± lanceolate, 3–4 mm (l/w = 2.5–5), apices acute, abaxial faces ± strigillose.

Heads

± sessile or on peduncles 5–25+ mm.

± sessile.

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.

2–2.5 mm, faces hairy, hair tips glochidiform;

pappi persistent;

on ray cypselae 12–15 lance-subulate scales 0.1–0.5 mm;

on disc cypselae 12–15+ subulate to setiform scales 2.5–3+ mm.

2n

= 36 (apomicts).

Townsendia rothrockii

Townsendia gypsophila

Phenology Flowering Aug. Flowering Apr–Sep.
Habitat South slopes Gypsum outcrops
Elevation 3600–4000 m (11800–13100 ft) 1600–2100 m (5200–6900 ft)
Distribution
from FNA
CO
[WildflowerSearch map]
[BONAP county map]
from FNA
NM
[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.)

Of conservation concern.

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

Source FNA vol. 20, p. 202. FNA vol. 20, p. 199.
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. 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 A. Gray ex Rothrock: Rep. U.S. Geogr. Surv., Wheeler 6: 148. (1879) Lowrey & P. J. Knight: Brittonia 46: 194, fig. 2. (1994)
Web links