Lasthenia maritima |
Lasthenia coronaria |
|
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hairy goldfields, maritime goldfields, maritime or seaside goldfields, seaside goldfields |
crowned goldfields, crowned or royal goldfields, royal goldfields |
|
Habit | Annuals, to 25 cm (herbage not sweetly scented). | Annuals, to 40 cm (herbage sweetly scented). |
Stems | usually prostrate or decumbent, rarely erect, branched proximally, glabrous or hairy at nodes and distally. |
erect, branched distally, usually glandular-puberulent (often with longer non-glandular hairs as well). |
Leaves | linear to oblanceolate, 10–90 × 2–12 mm, (fleshy) margins entire or lobed, faces glabrous. |
linear, 15–60 × 0.5–5 mm, (not fleshy) margins entire or 1–2-pinnately lobed, faces hairy. |
Involucres | hemispheric, 4–7 mm. |
hemispheric to obconic, 4–7 mm. |
Receptacles | conic, muricate, glabrous. |
conic, smooth, muricate, or pitted, hairy. |
Ray florets | 7–12; (corollas light to golden yellow) laminae oblong, 1–3 mm. |
6–15; (corollas yellow) laminae linear-oblong or oblong, 3–10 mm. |
Phyllaries | 6–14, lanceolate to ovate, hairy (especially at margins and midribs). |
6–14, lanceolate 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. |
black, linear to narrowly clavate, to 2.5 mm, hairy; pappi usually of 5–6+ lanceolate to ovate scales (1–5 uniaristate), sometimes of 4–5 subulate, aristate scales, or 0. |
Anther | appendages ± oblong, obtuse (style apices ± deltate, glabrous or with apical tufts of hairs and subapical fringes of shorter hairs). |
appendages elliptic, acute (style apices ± deltate with apical tufts of hairs and subapical fringes of shorter hairs). |
2n | = 8. |
= 8, 10. |
Lasthenia maritima |
Lasthenia coronaria |
|
Phenology | Flowering May–Jul. | Flowering Mar–May. |
Habitat | Seabird roosting sites, coastal headlands, offshore rocks, islands | Sunny, open grassy areas |
Elevation | 0–100 m (0–300 ft) | 0–700 m (0–2300 ft) |
Distribution |
CA; OR; WA; BC
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CA; Mexico (Baja California)
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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.) |
Pappus, head size, and branching pattern vary in Lasthenia coronaria. Two types of pappi are often found within a head and sometimes in different individuals of a population. The most distinctive feature of this species is its glandular herbage, which produces a characteristic sweet scent not present in any other lasthenia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 347. | FNA vol. 21, p. 347. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Ptilomeris | Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Ptilomeris |
Sibling taxa | ||
Synonyms | Burrielia maritima, Baeria maritima, Baeria minor subsp. maritima, L. minor subsp. maritima | Ptilomeris coronaria, Baeria californica, Baeria coronaria |
Name authority | (A. Gray) M. C. Vasey: Madroño 32: 139. (1985) | (Nuttall) Ornduff: Univ. Calif. Publ. Bot. 40: 76. (1966) |
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