|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 taprooted caudex.
Stem: 1–several, erect.
Leaf: basal and cauline, alternate or opposite; petioles short to long; blades generally 3-veined, linear to ± ovate, entire, ± scabrous.
Inflorescence: heads radiate, 1–few, in cyme-like cluster; peduncles long, bracts 0–few, leaf-like; involucre hemispheric; phyllaries in 2–3 series, free; receptacle flat to ± convex, paleate, paleae folded around ovary, entire, obtuse, tip hairy.
Ray flower: sterile; corolla yellow; style 0.
Disk flower: many; corolla and anthers yellow or purple; style tips short-triangular.
Fruit: thick or compressed; pappus 0 or 2 awns 1–2 mm (sometimes also crown of low scales).
9 species: w North America. (Latin: diminutive of Helianthus) [Weber 2006 FNANM 21:114–117]
1. Outer phyllaries generally enlarged, leaf-like, incurved; involucre 2.5–4 cm diam; fruit center thick, edge thin ..... H. castanea
1' Outer phyllaries seldom enlarged or leaf-like, not incurved; involucre generally (1)1.5–2 cm diam; fruit compressed, thin ..... H. californica
2. Pappus 0; stem branched; cauline leaves generally opposite ..... var. californica
2' Pappus present; stem generally unbranched; cauline leaves generally alternate
3. Disk generally 1.5–2 cm diam; pappus generally of 2 awns or narrow scales, 1–2 mm, and crown of short scales; leaf blades oblong- or lance-linear, (1.5)2–4(4.5) cm wide, heads generally 2–3 ..... var. nevadensis
3' Disk generally 1–1.5 cm diam; pappus generally of 2 awns, 1 mm; leaf blades linear to lance-linear (narrowly ovate), 3–6(18) mm wide; heads generally 1 ..... var. shastensis
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.