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small palafox, small palafoxia

othake, ray palafoxia

Habit Annuals, 20–60 cm. Annuals, 10–90 cm.
Stems

scabrous to glabrate, not stipitate-glandular.

usually proximally hispid, distally stipitate-glandular.

Leaf

blades linear, 20–70 × 1–4 mm.

blades broadly to narrowly lanceolate, 30–90 × 3–20 mm.

Involucres

± turbinate.

broadly to narrowly turbinate.

Ray florets

0.

3–5;

corollas 15–25 mm, laminae 5–12 mm.

Disc florets

5–30;

corollas actinomorphic, 5–6 mm, throats ± funnelform, shorter than lobes.

15–35;

corollas ± actinomorphic, 10–14 mm, throats ± funnelform, shorter than lobes.

Phyllaries

3–5 × 1+ mm, ± equal, ± strigillose, not stipitate-glandular.

9–12+ × 1.5–3 mm, ± equal, ± scabrous to hispid and/or stipitate-glandular.

Cypselae

3–5 mm;

pappus scales of inner cypselae 0.3–1 mm.

6–9 mm;

pappus scales of inner cypselae 7–9 mm.

2n

= 20.

= 24.

Palafoxia callosa

Palafoxia sphacelata

Phenology Flowering summer–fall. Flowering summer–fall.
Habitat Rocky, calcareous soils Sandy soils
Elevation 50–300 m (200–1000 ft) 1000–1800 m (3300–5900 ft)
Distribution
from FNA
AR; MO; TX; Mexico (Coahuila)
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; KS; NE; NM; OK; TX; Mexico (Chihuahua)
[WildflowerSearch map]
[BONAP county map]
Discussion

Some depauperate specimens of Palafoxia rosea (e.g., Oklahoma, Beckham Co., 17 Oct 1936, Eskero 1502, US) closely resemble P. callosa.

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

Source FNA vol. 21, p. 390. FNA vol. 21, p. 389.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Palafoxia Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Palafoxia
Sibling taxa
P. arida, P. feayi, P. hookeriana, P. integrifolia, P. reverchonii, P. riograndensis, P. rosea, P. sphacelata, P. texana
P. arida, P. callosa, P. feayi, P. hookeriana, P. integrifolia, P. reverchonii, P. riograndensis, P. rosea, P. texana
Synonyms Stevia callosa Stevia sphacelata
Name authority (Nuttall) Torrey & A. Gray: Fl. N. Amer. 2: 369. (1842) (Nuttall ex Torrey) Cory: Rhodora 48: 86. (1946)
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