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

PERICOME

Perennial, subshrub
Stems many from base
Leaves simple, generally opposite (or uppermost alternate), petioled, deltate-ovate, puberulent, gland-dotted; tip long-acuminate
Inflorescence: heads discoid, small, few–many in ± flat-topped cymes, these often arrayed in leafy-bracted, compound clusters; peduncles slender; involucre cylindric to bell-shaped; phyllaries in 1 series, linear, ± fused; receptacle rounded, naked
Flowers many; corollas 4-lobed, creamy yellow; anther tips triangular; style tips linear, tapered
Fruit oblanceolate, flat; surfaces black, puberulent, margins ± thickened, densely ciliate; pappus a low crown of fringed scales, sometimes with 1–2 bristles
Species in genus: 2 species: sw US, n Mex
Etymology: (Greek: hairs around, from ciliate fruit margin)
Reference: [Powell 1973 Southw Naturalist 18:335–339]

Native

P. caudata A. Gray


Stems < or = 2 m, much-branched, ± puberulent, resin-dotted
Leaves many; petioles 1.5–5 cm; blades 3–12 cm, base rounded to cordate or hastate, margin entire or basal half toothed or shallowly few-lobed
Inflorescence: peduncles 5–30 mm; involucre 4.5–6 mm diam; phyllaries 4.5–7 mm, fused in lower half, margins transparent, tips soft-hairy
Flowers: corollas 3–5 mm
Fruit 3.5–5 mm; pappus scales ± 1 mm, bristles 0–2, 1–4.5 mm, generally unequal
Chromosomes: 2n=36
Ecology: Dry, rocky slopes
Elevation: 1200–2400 m.
Bioregional distribution: s Sierra Nevada, East of Sierra Nevada
Distribution outside California: to Colorado, Texas, n Mexico
Flowering time: Jul–Oct

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bioregional map for PERICOME%20caudata being generated
 
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