Palafoxia arida |
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desert palafox, Spanish needle |
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Habit | Annuals, 10–200 cm. |
Stems | scabrous to nearly glabrous, sometimes distally stipitate-glandular. |
Leaf | blades lance-linear to linear, 20–120 × 2–55 mm. |
Involucres | cylindric to narrowly turbinate. |
Ray florets | 0. |
Disc florets | 9–40; corollas ± actinomorphic, 9–13 mm, throats ± cylindric, longer than lobes. |
Phyllaries | ± equal, 10–25 × 1–2.5 mm, ± scabrous, sometimes stipitate-glandular. |
Cypselae | 10–16 mm; pappus scales of inner cypselae 8–12 mm. |
2n | = 24. |
Palafoxia arida |
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Phenology | Flowering late winter–spring(–summer). |
Habitat | Sandy soils |
Elevation | 30–1000 m (100–3300 ft) |
Distribution |
AZ; CA; NV; UT; Mexico (Baja California, Sonora)
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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. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Palafoxia |
Sibling taxa | |
Synonyms | P. arida var. gigantea |
Name authority | B. L. Turner & M. I. Morris: Madroño 23: 79. (1975) |
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