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| Jepson eFlora
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. |
Annual to perennial herb.
Stem: erect, simple or sparingly branched.
Leaf: simple, basal and cauline, alternate, petioled or distal sessile; blade entire, toothed or pinnately lobed.
Inflorescence: heads radiate or discoid, 1–few, terminal; peduncle long, stout; involucre disk-shaped; phyllaries ± equal or unequal in 1–3 series, spreading or reflexed; receptacle generally columnar to conic or ± spheric, paleate; paleae oblong, entire, folded around fruits, hairy distally.
Ray flower: 0 or 7–21, sterile; corolla yellow, ray 2–6 cm.
Disk flower: many; corolla green-yellow to dark brown-purple, diam of tube and throat ± equal; anther tip triangular; style tips rounded or blunt-triangular to long- tapered.
Fruit: oblong, ± 4-angled; pappus a crown of fused scales or 0.
23 species: North America. (O.J. Rudbeck, 1630–1702, and O.O. Rudbeck, 1660–1740, botany professors at Uppsala, Sweden) [Urbatsch & Cox 2006 FNANM 21:44–60]
1. Heads discoid ..... R. occidentalis
1' Heads radiate
2. St hairy; pappus 0; disk corollas dark brown-purple; receptacle ± spheric or ovoid ..... R. hirta var. pulcherrima
2' St glabrous or nearly so; pappus a crown of fused or ± separate scales; disk corollas green-yellow; receptacle ovoid or conic to columnar
3. Lvs green; abaxial leaf face hairy ..... R. californica
3' Lvs blue-green, glaucous, abaxial leaf face glabrous
4. Lf margins entire or with a few shallow teeth ..... R. glaucescens
4' Lf margins generally coarsely toothed or lobed ..... R. klamathensis
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.