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yellow ray goldfields

coastal goldfields

Habit Annuals, to 60 cm. Annuals, to 35 cm (herbage not sweetly scented).
Stems

erect, branched distally, glabrous or slightly hairy.

erect, branched distally, ± woolly, especially distally.

Leaves

linear or subulate, 40–150 × 2–3+ mm, margins entire, faces glabrous.

broadly to narrowly linear, 20–120 × 1–10 mm, margins entire or irregularly toothed or lobed (lobes to 1.5 mm), faces glabrous or villous.

Involucres

hemispheric, 5–10 mm.

hemispheric, 4–6 mm.

Receptacles

± conic, papillate, glabrous or sparsely hairy.

conic, muricate, glabrous.

Ray florets

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

(8–)13; (corollas light to golden yellow) laminae oblong, 4–8 mm.

Phyllaries

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

7–14, oblong to ovate, hairy (especially at margins).

Cypselae

gray, clavate or obovoid, 2–3.5 mm, margins not ciliate, faces glabrous, or hairy and papillate (papillae rusty or yellowish, wartlike);

pappi 0.

black, narrowly clavate, 2–2.5 mm, glabrous or hairy;

pappi 0, or of 2–3(–4) brown or white, lanceolate or subulate, aristate scales plus 4–5+ shorter, ± truncate, fimbriate scales.

Anther

appendages deltate or broadly ovate.

appendages ovate or elliptic, acute (style apices ± deltate with apical tufts of hairs and subapical fringes of shorter hairs).

2n

= 8.

Lasthenia glabrata

Lasthenia minor

Phenology Flowering Mar–Jun.
Habitat Grasslands, coastal and inland
Elevation 0–700 m (0–2300 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

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.)

Lasthenia minor is variable; coastal plants tend to have lower stature and broader leaves and tend to flower later in the year. Inland populations were once common in the San Joaquin Valley and are now harder to find as grasslands become cultivated, grazed, or built upon. Epappose plants are common and sometimes comprise entire populations.

(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. 343. FNA vol. 21, p. 347.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Hologymne Asteraceae > tribe Heliantheae > subtribe Baeriinae > Lasthenia > sect. Ptilomeris
Sibling taxa
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
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. maritima, L. microglossa, L. ornduffii, L. platycarpha
Subordinate taxa
L. glabrata subsp. coulteri, L. glabrata subsp. glabrata
Synonyms Monolopia minor, Baeria minor
Name authority Lindley: Edwards’s Bot. Reg. 21: plate 1780. (1835) (de Candolle) Ornduff: Univ. Calif. Publ. Bot. 40: 80. (1966)
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