Lasthenia maritima |
Lasthenia glabrata |
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hairy goldfields, maritime goldfields, maritime or seaside goldfields, seaside goldfields |
yellow ray goldfields |
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Habit | Annuals, to 25 cm (herbage not sweetly scented). | Annuals, to 60 cm. | ||||
Stems | usually prostrate or decumbent, rarely erect, branched proximally, glabrous or hairy at nodes and distally. |
erect, branched distally, glabrous or slightly hairy. |
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Leaves | linear to oblanceolate, 10–90 × 2–12 mm, (fleshy) margins entire or lobed, faces glabrous. |
linear or subulate, 40–150 × 2–3+ mm, margins entire, faces glabrous. |
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Involucres | hemispheric, 4–7 mm. |
hemispheric, 5–10 mm. |
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Receptacles | conic, muricate, glabrous. |
± conic, papillate, glabrous or sparsely hairy. |
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Ray florets | 7–12; (corollas light to golden yellow) laminae oblong, 1–3 mm. |
7–15; (corollas yellow) laminae oblong, 4–14 mm. |
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Phyllaries | 6–14, lanceolate to ovate, hairy (especially at margins and midribs). |
10–14, ± lanceolate (distinct tips ± deltate), glabrous but for apices. |
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Cypselae | gray, linear to narrowly clavate, (2–)2.5–3 mm, ± hairy; pappi usually of 4–6(–12) brown, lanceolate or subulate, aristate scales plus 4–5+ shorter, laciniate scales, rarely 0. |
gray, clavate or obovoid, 2–3.5 mm, margins not ciliate, faces glabrous, or hairy and papillate (papillae rusty or yellowish, wartlike); pappi 0. |
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Anther | appendages ± oblong, obtuse (style apices ± deltate, glabrous or with apical tufts of hairs and subapical fringes of shorter hairs). |
appendages deltate or broadly ovate. |
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2n | = 8. |
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Lasthenia maritima |
Lasthenia glabrata |
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Phenology | Flowering May–Jul. | |||||
Habitat | Seabird roosting sites, coastal headlands, offshore rocks, islands | |||||
Elevation | 0–100 m (0–300 ft) | |||||
Distribution |
CA; OR; WA; BC
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CA
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Discussion | Lasthenia maritima is a self-pollinating, “guano endemic” of seabird nesting grounds. It is typically found on offshore islands and rocks from the Farallon Islands, California, to the northern tip of Vancouver Island, British Columbia and rarely occurs on the mainland. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). Historically, aboriginal Californians used fruits and leaves of Lasthenia glabrata for food. The subspecies are allopatric and almost identical except for their cypselae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 347. | FNA vol. 21, p. 343. | ||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Ptilomeris | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Hologymne | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Burrielia maritima, Baeria maritima, Baeria minor subsp. maritima, L. minor subsp. maritima | |||||
Name authority | (A. Gray) M. C. Vasey: Madroño 32: 139. (1985) | Lindley: Edwards’s Bot. Reg. 21: plate 1780. (1835) | ||||
Web links |
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