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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.

LAGOPHYLLA

Annual 1–15 dm, green to canescent, generally self-sterile
Leaves alternate (or lower opposite), linear to oblanceolate, entire to toothed; lower soon deciduous; upper ± bract-like
Inflorescence spike- to panicle-like; heads radiate, opening in evening, generally closing by ± midday, ± short-peduncled; phyllaries fully folded around ray ovaries, falling with fruits, tips flat, erect or spreading; receptacle flat, short-hairy; chaff scales 5 in ring between ray and disk flowers, weakly fused
Ray flowers 5; ligule 3-lobed, yellow, red-veined, often aging purplish
Disk flowers 6, staminate; corolla yellow; anthers black, tips widely triangular; ovaries slender, style branches undivided
Fruit: pappus 0; ray achenes compressed front-to-back
Species in genus: 4 species: CA
Etymology: (Greek: hare leaf, from copious leaf hairs)
Reference: [Thompson 1983 PhD Univ CA Davis]

Native

L. minor (D.D. Keck) D.D. Keck


Stems repeatedly forked, often spreading, strigose, dark purple-brown
Leaves 2–5.5 cm, linear; basal toothed; cauline entire, minutely strigose or short-rough-hairy; upper finely long-ciliate
Inflorescence ± nonglandular; heads borne in stem forks; involucre hemispheric; phyllaries 4–5 mm, acuminate, soft-hairy, very-long-ciliate
Ray flowers: ligules 8–13 mm, bright yellow
Disk flowers: corollas 3–3.5 mm
Fruit 2.1–2.7 mm, oblanceolate, glossy black; midvein evident
Chromosomes: 2n=14
Ecology: Foothill woodland, often on serpentine
Elevation: < 700 m.
Bioregional distribution: Inner North Coast Ranges, n Sierra Nevada Foothills (El Dorado Co.).Fls spring.

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