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

Lasthenia californica

California goldfields, goldfields, slender goldfields

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.

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.

Involucres

hemispheric, 4–7 mm.

campanulate to depressed-hemispheric or 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.

6–16;

laminae linear to oblong, 5–18 mm.

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.

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.

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.

Lasthenia maritima

Lasthenia californica

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; OR
[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 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.)

Key
1. Annuals; coastal or inland; n California, s Oregon
subsp. californica
1. Perennials (sometimes flowering first year); coastal; California
→ 2
2. Roots fleshy, clustered; stems erect, branched distally; leaf blades 1–2+ mm wide
subsp. bakeri
2. Roots usually not fleshy or clustered; stems decumbent, branched proximally; leaf blades 1.5–5.5(–15) mm wide
subsp. macrantha
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
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. chrysantha, L. conjugens, L. coronaria, L. debilis, L. ferrisiae, L. fremontii, L. glaberrima, L. glabrata, L. gracilis, L. leptalea, L. maritima, L. microglossa, L. minor, L. ornduffii, L. platycarpha
Subordinate taxa
L. californica subsp. bakeri, L. californica subsp. californica, L. californica subsp. macrantha
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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