Jepson Flora Project: Jepson Interchange    

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

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



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.


Annual, perennial herb, shrubs
Stems generally several from base
Leaves simple, alternate or opposite, sessile or petioled
Inflorescence: heads radiate or discoid, solitary or in few-headed, terminal cymes; peduncles long or short; involucre hemispheric or bell-shaped; phyllaries in several series, equal to very unequal; receptacle rounded to conic, chaffy; chaff scales entire or 3-lobed, folded around fruits
Ray flowers 0–many, sterile; corolla yellow; ligules entire to 3-lobed
Disk flowers many; corollas yellow or orange; anther tips triangular; style tips triangular
Fruit ± flattened, obovate, glabrous or ± hairy; pappus of scales, generally 1 or more lanceolate
Species in genus: ± 150 species: New World
Etymology: (L.G.A. Viguier, 1790–1867, French physician, botanist)
Reference: [Shilling 1990 Madroño 37:149–170]


V. reticulata S. Watson

Shrub < 1.5 m diam
Stems many, 5–15 dm, soft-hairy; bark peeling in age
Leaves opposite below, alternate above; petioles 3.5–30 mm; blades 2–9 cm, ovate, 3-veined from truncate to cordate base, tip acute, margin entire, upper surface densely canescent-tomentose, undersurface with veins prominently raised, gray-green, loosely tomentose
Inflorescence: cyme few-headed, on long, ± naked branch; bracts reduced to scales 3–10 mm; peduncles 5–50 mm; heads radiate; involucre hemispheric or appearing disk-like when pressed; phyllaries in 2–3 unequal series, 2–5 mm, oblong to ovate, obtuse, short-white-hairy; chaff scales 4–5.5 mm
Ray flowers 10–15; ligules 7–15 mm
Disk flowers: corollas 3–4 mm
Fruit 2.5–4 mm, obovate; pappus of 2 scales (each 0.5–1 mm) and 1–2 lanceolate scales (each 1–2.8 mm)
Ecology: Arid slopes
Elevation: < 1500 m.
Bioregional distribution: Mojave Desert
Distribution outside California: w Nevada
Flowering time: Feb–Jun
Horticultural information: TRY.

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