Palafoxia arida |
Palafoxia reverchonii |
|
---|---|---|
desert palafox, Spanish needle |
Reverchon's palafox |
|
Habit | Annuals, 10–200 cm. | Annuals, 10–90 cm. |
Stems | scabrous to nearly glabrous, sometimes distally stipitate-glandular. |
usually proximally appressed-pubescent, distally stipitate-glandular. |
Leaf | blades lance-linear to linear, 20–120 × 2–55 mm. |
blades narrowly lanceolate, 30–90 × 2–6 mm. |
Involucres | cylindric to narrowly turbinate. |
turbinate. |
Ray florets | 0. |
3–8; corollas 15–25 mm, laminae 6–12 mm. |
Disc florets | 9–40; corollas ± actinomorphic, 9–13 mm, throats ± cylindric, longer than lobes. |
12–30; corollas ± actinomorphic, 5–8 mm, throats ± funnelform, shorter than lobes. |
Phyllaries | ± equal, 10–25 × 1–2.5 mm, ± scabrous, sometimes stipitate-glandular. |
6–8 × 1.5–3 mm, ± equal, ± scabrous to puberulous and stipitate-glandular. |
Cypselae | 10–16 mm; pappus scales of inner cypselae 8–12 mm. |
5–6 mm; pappus scales of inner cypselae 3–6 mm. |
2n | = 24. |
= 24. |
Palafoxia arida |
Palafoxia reverchonii |
|
Phenology | Flowering late winter–spring(–summer). | Flowering late summer–fall. |
Habitat | Sandy soils | Sandy soils |
Elevation | 30–1000 m (100–3300 ft) | 10–100+ m (0–300+ ft) |
Distribution |
AZ; CA; NV; UT; Mexico (Baja California, Sonora)
|
TX |
Discussion | Plants of Palafoxia arida 90–150 cm with phyllaries 16–25 mm (from dunes west of Yuma, Arizona) have been treated as var. gigantea. Plants referable to P. arida have been named P. linearis (Cavanilles) Lagasca (including var. gigantea M. E. Jones) in other floras; P. linearis is a Mexican species (see B. L. Turner and M. I. Morris 1976). (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 | P. arida var. gigantea | Othake reverchonii |
Name authority | B. L. Turner & M. I. Morris: Madroño 23: 79. (1975) | (Bush) Cory: Rhodora, 48: 86. (1946) |
Web links |