Lasthenia maritima |
Lasthenia californica |
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hairy goldfields, maritime goldfields, maritime or seaside goldfields, seaside goldfields |
California goldfields, goldfields, slender goldfields |
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Habit | Annuals, to 25 cm (herbage not sweetly scented). | Annuals or perennials, to 40 cm (cespitose). | ||||||||
Stems | usually prostrate or decumbent, rarely erect, branched proximally, glabrous or hairy at nodes and distally. |
erect or decumbent, branched proximally or distally, ± hairy. |
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Leaves | linear to oblanceolate, 10–90 × 2–12 mm, (fleshy) margins entire or lobed, faces glabrous. |
linear to oblanceolate or oblong, 8–210 × 1–5.5(–15) mm, (± fleshy in coastal forms) margins entire or with 3–5+ teeth, faces glabrous or ± hairy. |
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Involucres | hemispheric, 4–7 mm. |
campanulate to depressed-hemispheric or hemispheric, 5–14 mm. |
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Receptacles | conic, muricate, glabrous. |
conic, muricate, glabrous. |
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Ray florets | 7–12; (corollas light to golden yellow) laminae oblong, 1–3 mm. |
6–16; laminae linear to oblong, 5–18 mm. |
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Phyllaries | 6–14, lanceolate to ovate, hairy (especially at margins and midribs). |
(persistent or falling with cypselae) 4–16 (in 1–2 series), elliptic to ovate or lanceolate to oblong, hairy. |
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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. |
black to gray or silver-gray, linear to narrowly clavate, to 4 mm, glabrous or hairy; pappi 0, or of 1–7 translucent (rarely opaque), brown (rarely white), linear to subulate, aristate scales. |
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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 to sublanceolate. |
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2n | = 8. |
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Lasthenia maritima |
Lasthenia californica |
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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; OR
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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 3 (3 in the flora). Plants of Lasthenia californica, especially those in coastal populations, have the largest, showiest heads in the genus. Report of L. californica from Massachusetts was not confirmed for this study (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. 338. | ||||||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Ptilomeris | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Amphiachaenia | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Burrielia maritima, Baeria maritima, Baeria minor subsp. maritima, L. minor subsp. maritima | Baeria chrysostoma, L. chrysostoma, L. hirsutula | ||||||||
Name authority | (A. Gray) M. C. Vasey: Madroño 32: 139. (1985) | de Candolle ex Lindley: Edwards’s Bot. Reg. 21: sub plate 1780. (1835) | ||||||||
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