Lasthenia fremontii

(Torrey ex A. Gray) Greene
Man. Bot. San Francisco, 204. 1894.
Common names: Fremont’s goldfields
Basionym: Dichaeta fremontii Torrey ex A. Gray Mem. Amer. Acad. Arts, n. s. 4: 102. 1849
Synonyms: Baeria fremontii (Torrey ex A. Gray) A. Gray
Treatment appears in FNA Volume 21. Treatment on page 345. Mentioned on page 346.

Annuals, to 35 cm. Stems erect, branched proximally, glabrous proximally, ± hairy distally. Leaves linear, 10–60 × 1–2+ mm (simple blades or single lobes), margins entire or with 1–3 pairs of linear lobes, faces glabrous or sparsely hairy. Involucres hemispheric or obconic, 4–7.5 mm. Phyllaries 8–16 (distinct), ovate, hairy. Receptacles dome-shaped, muricate, hairy. Ray florets 6–13; laminae oblong to oval, 5–7 mm. Anther appendages linear to narrowly ovate. Cypselae black or gray, clavate, to 1.5 mm, usually scabrous, rarely glabrous; pappi usually of (3–)4(–5) subulate, aristate scales plus 3–5+ shorter, ± subulate scales or teeth, rarely of aristate scales only, or 0. 2n = 12.

Phenology: Flowering Mar–May.
Habitat: Vernal pools and wet meadows
Elevation: 0–700 m


Pappose and epappose plants of Lasthenia fremontii sometimes occur together. The ranges of L. fremontii and L. conjugens overlap slightly; the two species sometimes occur together.

Selected References


Lower Taxa