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hairy goldfields, maritime goldfields, maritime or seaside goldfields, seaside goldfields

yellow ray goldfields

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.

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.

Involucres

hemispheric, 4–7 mm.

hemispheric, 5–10 mm.

Receptacles

conic, muricate, glabrous.

± conic, papillate, glabrous or sparsely hairy.

Ray florets

7–12; (corollas light to golden yellow) laminae oblong, 1–3 mm.

7–15; (corollas yellow) laminae oblong, 4–14 mm.

Phyllaries

6–14, lanceolate to ovate, hairy (especially at margins and midribs).

10–14, ± lanceolate (distinct tips ± deltate), glabrous but for apices.

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.

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.

2n

= 8.

Lasthenia maritima

Lasthenia glabrata

Phenology Flowering May–Jul.
Habitat Seabird roosting sites, coastal headlands, offshore rocks, islands
Elevation 0–100 m (0–300 ft)
Distribution
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
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.)

Key
1. Cypselae glabrous, not papillate
subsp. glabrata
1. Cypselae ± hairy and papillate
subsp. coulteri
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
L. burkei, L. californica, L. chrysantha, L. conjugens, L. coronaria, L. debilis, L. ferrisiae, L. fremontii, L. glaberrima, L. glabrata, L. gracilis, L. leptalea, L. microglossa, L. minor, L. ornduffii, L. platycarpha
L. burkei, L. californica, L. chrysantha, L. conjugens, L. coronaria, L. debilis, L. ferrisiae, L. fremontii, L. glaberrima, L. gracilis, L. leptalea, L. maritima, L. microglossa, L. minor, L. ornduffii, L. platycarpha
Subordinate taxa
L. glabrata subsp. coulteri, L. glabrata subsp. glabrata
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)
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