Palafoxia callosa |
Palafoxia sphacelata |
|
---|---|---|
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 |
AR; MO; TX; Mexico (Coahuila)
|
CO; KS; NE; NM; OK; TX; Mexico (Chihuahua)
|
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 | ||
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) |
Web links |