Lasthenia maritima |
Lasthenia ornduffii |
|
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hairy goldfields, maritime goldfields, maritime or seaside goldfields, seaside goldfields |
large-flower goldfields, Ornduff's goldfields, Ornduff's lasthenia |
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Habit | Annuals, to 25 cm (herbage not sweetly scented). | Perennials, 4–28 cm. |
Stems | usually prostrate or decumbent, rarely erect, branched proximally, glabrous or hairy at nodes and distally. |
decumbent, branched proximally, ± hairy throughout, more so distally. |
Leaves | linear to oblanceolate, 10–90 × 2–12 mm, (fleshy) margins entire or lobed, faces glabrous. |
linear to oblong, 6–40 × 1.8–5(–18) mm, (± fleshy) margins entire or with 3–5+ teeth, faces glabrous or ± hairy. |
Involucres | hemispheric, 4–7 mm. |
campanulate to depressed-hemispheric, 5–14 mm. |
Receptacles | conic, muricate, glabrous. |
conic, muricate, glabrous. |
Ray florets | 7–12; (corollas light to golden yellow) laminae oblong, 1–3 mm. |
8–15; laminae elliptic to oblong, 5–9(–13.4) mm. |
Phyllaries | 6–14, lanceolate to ovate, hairy (especially at margins and midribs). |
(± persistent) 8–14 (in 2 series), elliptic to ovate, ± 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. |
silver-gray, linear to narrowly clavate, to 4 mm, glabrous; pappi 0, or of 1–4 translucent, brown, subulate, aristate scales (often variable within heads). |
Anther | appendages ± oblong, obtuse (style apices ± deltate, glabrous or with apical tufts of hairs and subapical fringes of shorter hairs). |
appendages deltate to sublanceolate. |
2n | = 8. |
= 32. |
Lasthenia maritima |
Lasthenia ornduffii |
|
Phenology | Flowering May–Jul. | Flowering year round (mostly May–Aug). |
Habitat | Seabird roosting sites, coastal headlands, offshore rocks, islands | Coastal bluffs |
Elevation | 0–100 m (0–300 ft) | 0–500 m (0–1600 ft) |
Distribution |
CA; OR; WA; BC
|
OR |
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.) |
Of conservation concern. Lasthenia ornduffii is known only from six or so populations in grasslands along the immediate coast in Curry County. The plants are usually scapiform. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 347. | FNA vol. 21, p. 341. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Ptilomeris | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Amphiachaenia |
Sibling taxa | ||
Synonyms | Burrielia maritima, Baeria maritima, Baeria minor subsp. maritima, L. minor subsp. maritima | L. macrantha subsp. prisca |
Name authority | (A. Gray) M. C. Vasey: Madroño 32: 139. (1985) | R. Chan: Madroño 48: 209. (2002) |
Web links |
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