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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

ASTERACEAE

SUNFLOWER FAMILY

David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)4–5; stamens 4–5, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):1–28. See glossary p. 25 for illustrations of general family characteristics.

LASTHENIA

GOLDFIELDS

Robert Ornduff

Annual, perennial herb, glabrous or hairy
Stem generally branched, generally erect, < 60 cm
Leaves opposite, < 20 cm, entire to pinnately cut
Inflorescence: heads radiate, solitary or in cymes; phyllaries in 1 or 2 series, free or partly fused; receptacle narrowly conic to hemispheric, naked, smooth, pitted, or rough
Ray flowers 4–21; ligules generally yellow
Disk flowers generally many; corollas generally 5-lobed, generally yellow; anther tips acuminate to triangular; style tips triangular or round, generally hair-tufted
Fruit < 5 mm, cylindric to obovoid, black or gray; pappus of awns, scales, or 0
Species in genus: 17 species: w North America, Chile
Etymology: (Greek: female pupil of Plato)
Reference: [Ornduff 1966 Univ Calif Publ Bot 40:1–92]
Generally self-incompatible (cross-pollinated).

Native

L. leptalea (A. Gray) Ornduff

SALINAS VALLEY GOLDFIELDS

Annual < 15 cm, erect
Stem simple or branched, glabrous below
Leaves 3–20 mm, linear, entire, sparsely hairy
Inflorescence: involucre 4–6 mm, obconic to bell-shaped; phyllaries generally 4–6, hairy at tips; receptacle narrowly conic, glabrous
Ray flowers 6–9; ligules 2.5–5 mm
Disk flowers many; anther tips awl-shaped; style tips ± triangular, long hair-tufted
Fruit < 2 mm, narrowly club-shaped, sparsely hairy; pappus of < 4 awns, each narrowly tapered, white or yellowish (or 0 in some flowers)
Chromosomes: 2n=16
Ecology: UNCOMMON. Open areas in woods
Elevation: < 500 m.
Bioregional distribution: South Coast Ranges (Monterey, San Luis Obispo cos.).
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for LASTHENIA%20leptalea being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Lasthenia leptalea
Retrieve dichotomous key for Lasthenia
Retrieve multiple-entry key (MEKA) for Lasthenia
Overlay Consortium of California Herbaria specimen data by county on this map
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