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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.

PECTIS

Annual, perennial herb, often scented
Stems prostrate to erect
Leaves simple, opposite, sessile, narrow, bristly-ciliate, dotted with embedded oil glands
Inflorescence: heads radiate, peduncled, solitary or in leafy cymes; involucre cylindric to bell-shaped; phyllaries in 1 series, free, gland-dotted; receptacle naked
Ray flowers as many as and subtended by phyllaries; corollas yellow
Disk flowers few–many; corollas yellow, 4–5-lobed, generally 2-lipped
Fruit cylindric, generally puberulent; pappus of bristles, scales, or awns
Species in genus: ± 85 species: w US, Caribbean, South America
Etymology: (Greek: comb, from ciliate leaves)
Reference: [Keil 1977 Rhodora 79:32–78]

Native

P. papposa Harv. & A. Gray var. papposa

CHINCH-WEED

Annual 1–20 cm, mound-shaped; herbage spicy-scented
Stems 1–several from base, simple or much-branched
Leaves narrowly linear, gland-dotted on margins
Inflorescence: heads in dense cymes, 6–10 mm diam; peduncles 3–10 mm; phyllaries 8, 3–5 mm, linear, each with subterminal gland and several smaller submarginal glands
Ray flowers 8; corollas 3–6 mm
Disk flowers 6–14; corollas 2–3.5 mm
Fruit 2–4.5 mm; pappus of rays a low crown; pappus of disk ± 20 subplumose bristles
Ecology: Arid plains, rocky slopes
Elevation: < 1500 m.
Bioregional distribution: East of Sierra Nevada, Desert
Distribution outside California: to sw Utah, sw New Mexico, nw Mexico
Flowering time: After summer rains, Jun, Sep–Nov
Horticultural information: STBL.

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bioregional map for PECTIS%20papposa%20var.%20papposa being generated
 
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