Lasthenia maritima |
Lasthenia microglossa |
|
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hairy goldfields, maritime goldfields, maritime or seaside goldfields, seaside goldfields |
small-Ray goldfields |
|
Habit | Annuals, to 25 cm (herbage not sweetly scented). | Annuals, to 25 cm. |
Stems | usually prostrate or decumbent, rarely erect, branched proximally, glabrous or hairy at nodes and distally. |
erect or sprawling, branched distally, villous, especially distally. |
Leaves | linear to oblanceolate, 10–90 × 2–12 mm, (fleshy) margins entire or lobed, faces glabrous. |
linear or subulate, 15–80 × 1.5–2(–4) mm, margins ± entire, faces moderately hairy. |
Involucres | hemispheric, 4–7 mm. |
cylindric to narrowly obconic, 6–8.5 mm. |
Receptacles | conic, muricate, glabrous. |
subulate, papillate, glabrous. |
Ray florets | 7–12; (corollas light to golden yellow) laminae oblong, 1–3 mm. |
4; (corollas yellow) laminae lance-elliptic, (0–)0.5–1 mm. |
Disc corolla | lobes 4(–5). |
|
Phyllaries | 6–14, lanceolate to ovate, hairy (especially at margins and midribs). |
4, elliptic to oblong, hairy. |
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, ± linear, to 5 mm, hairy; pappi 0, or of 1–4 brown or white, linear to ovate or lanceolate, aristate scales (sometimes variable within heads). |
Anther | appendages ± oblong, obtuse (style apices ± deltate, glabrous or with apical tufts of hairs and subapical fringes of shorter hairs). |
appendages subulate (without wartlike glands; style apices lanceolate, glabrous). |
2n | = 8. |
= 24. |
Lasthenia maritima |
Lasthenia microglossa |
|
Phenology | Flowering May–Jul. | Flowering Mar–May. |
Habitat | Seabird roosting sites, coastal headlands, offshore rocks, islands | Shaded areas, woodlands, chaparral, deserts |
Elevation | 0–100 m (0–300 ft) | 0–1000 m (0–3300 ft) |
Distribution |
CA; OR; WA; BC
|
CA
|
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.) |
Because the rays are inconspicuous, plants of the self-pollinating Lasthenia microglossa are easy to overlook. Besides growing in habitats similar to those occupied by L. debilis, L. microglossa is found also beneath chaparral shrubs and extends into desert areas, where it grows near rocks that may provide favorable shade and moisture conditions. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 347. | FNA vol. 21, p. 342. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Ptilomeris | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Burrielia |
Sibling taxa | ||
Synonyms | Burrielia maritima, Baeria maritima, Baeria minor subsp. maritima, L. minor subsp. maritima | Burrielia microglossa, Baeria microglossa |
Name authority | (A. Gray) M. C. Vasey: Madroño 32: 139. (1985) | (de Candolle) Greene: Man. Bot. San Francisco, 205. (1894) |
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