|University of California, Berkeley|
|Directory News Site Map Home|
Key to families | Table of families and genera
This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.
Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
Perennial from stout taproot and caudex.
Stem: generally ± erect, branched basally or distally.
Leaf: basal and cauline, alternate, basal largest, present on flowering stems or 0, lance- linear to broadly ovate, cauline often sessile, distal reduced.
Inflorescence: heads generally radiate, 1–few, ± large; involucre hemispheric or bell-shaped; phyllaries ± many in 2–3 series, outer often ± leaf-like; receptacle ± convex, paleate; paleae ± linear, entire, generally ± hairy.
Ray flower: 0 or (1)5–25; ray generally yellow.
Disk flower: 35–150+; corolla yellow or orange, lobes short; anthers brown or yellow, tips triangular; style tips linear, tapered.
Fruit: pappus 0, of 1–several triangular or lanceolate scales, or a low crown; ray fruit 3-angled; disk fruit 4-angled, sometimes ± compressed.
10 species: w North America. (Nathaniel J. Wyeth, Am explorer, 1802–1856) [Weber 2006 FNANM 21:100–106] Some species sometimes treated in Agnorhiza.
1. Heads discoid (or ray flowers rarely 1–3) ..... W. invenusta
1' Heads radiate, ray flowers 5–21+
2. Basal leaves 0 on flowering stems (or generally < cauline leaves)
3. Outer phyllaries many, generally not leaf-like, generally < 6 mm wide; involucre hemispheric; plant generally > 5 dm
4. Plant densely soft-hairy; fruit 8–12 mm, glabrous or distally short-hairy; pappus (0.5)1–3 mm ..... W. elata
4' Plant scabrous and sparsely bristly; fruit 5–6 mm, glabrous; pappus 0 or minute ..... W. reticulata
3' Outer phyllaries 4–6, ± leaf-like, generally 6–17 mm wide; involucre bell-shaped; plant generally 1–3(5) dm
5. Head 1; leaves glabrous; pappus 0 or a crown 0.1–0.3 mm ..... W. bolanderi
5' Heads generally several; young leaves tomentose; pappus a crown of triangular scales 1–1.5 mm ..... W. ovata
2' Basal leaves present on flowering stems, generally > cauline leaves
6. Outer phyllaries wide, leaf-like, generally >> inner; head generally 1(2), large
7. Plant shiny green, glabrous or sparsely short-hairy, glandular; phyllaries glabrous or glandular; fruit 10–13 mm ..... W. glabra
7' Plant densely tomentose, often becoming ± glabrous; phyllaries persistently tomentose; fruit 12–15 mm ..... W. helenioides
6' Outer phyllaries narrow, generally not or barely leaf-like, generally barely or not > inner; heads 1–few
8. Plant ± tomentose, often becoming glabrous; phyllaries generally few ..... W. mollis
8' Plant glabrous to short-hairy; phyllaries generally many
9. Phyllaries ± soft-hairy, ciliate; head generally 1 ..... W. angustifolia
9' Phyllaries glabrous or puberulent, margins occasionally ± puberulent, not ciliate; heads 1–4 ..... W. longicaulis
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.