Hazardia squarrosa |
Hazardia cana |
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saw-tooth bristleweed, saw-tooth goldenbush |
island hazardia, San Clemente Island bristleweed, San Clemente Island hazardia |
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Habit | Shrubs, 30–250 cm. | Shrubs, 60–250 cm. | ||||||||
Stems | usually sparsely tomentose or pilose. |
lanate-tomentose. |
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Leaves | sessile; blades oblong or oblong-obovate to widely obovate, 13–35(–50) × 5–17(–24) mm, coriaceous, bases clasping to subclasping, margins spinulose-dentate (teeth in 3–13 pairs), adaxial faces glabrous to sparsely puberulent. |
subsessile or subpetiolate; blades oblanceolate, 4–12 × 1–4 cm, thin, bases not clasping, margins serrulate to subentire, abaxial faces densely short-tomentose, adaxial glabrate or glabrescent. |
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Involucres | turbinate, 8–16 × 7–10 mm. |
broadly turbinate, 7–10 × 5–8 mm. |
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Ray florets | 0. |
6–14, fertile; corollas shorter than involucre, inconspicuous. |
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Disc florets | 9–30; corollas 9–11 mm. |
15–25; corollas 5–8 mm. |
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Phyllaries | apically spreading to reflexed, oblong, apices with green area 1–2 mm, faces prominently stipitate-glandular (at least apically). |
erect, oblong, apices acute, faces of outer loosely woolly-tufted apically. |
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Heads | borne in racemo-spiciform or glomerate-spiciform arrays. |
in thyrsiform arrays. |
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Cypselae | 5–8 mm, glabrous. |
3–4 mm, canescent. |
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2n | = 10. |
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Hazardia squarrosa |
Hazardia cana |
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Phenology | Flowering Jun–Sep. | |||||||||
Habitat | Rocky canyon walls | |||||||||
Elevation | 200–500 m (700–1600 ft) | |||||||||
Distribution |
CA; nw Mexico
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CA; Mexico (Baja California) |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hazardia cana is known from San Clemente Island. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 448. | FNA vol. 20, p. 449. | ||||||||
Parent taxa | Asteraceae > tribe Astereae > Hazardia | Asteraceae > tribe Astereae > Hazardia | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Haplopappus squarrosus | Diplostephium canum, Haplopappus canus | ||||||||
Name authority | (Hooker & Arnott) Greene: Erythea 2: 112. (1894) | (A. Gray) Greene: Pittonia 1: 29. (1887) | ||||||||
Web links |