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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. |
Perennial or subshrub, generally aromatic, silky; hairs basally forked, attached off-center; herbage dotted with resin glands.
Leaf: alternate, often crowded at base; entire or 3-lobed to 1–3-pinnately dissected.
Inflorescence: heads disciform, 1–many; involucre hemispheric or bell-shaped; phyllaries graduated in 2–3 series, scarious-margined and -tipped; receptacle hemispheric, glabrous or hairy, epaleate.
Pistillate flower: 4–15+, marginal; corolla narrowly tubular, lobes generally 3.
Disk flower: 30–50; corolla tubular to bell-shaped; anther base rounded or ± cordate, tip awl-shaped to lanceolate or ovate; style tips truncate, brush-like.
Fruit: cylindric, 2–3- or 5–10-ribbed; pappus generally 0 or a narrow crown of awl-shaped scales.
9 species: w North America. (Greek: sphere + division) [Lowrey & Shultz 2006 FNANM 19:499–502] Recent studies place Sphaeromeria in Artemisia (Garcia et al. 2011 Amer J Bot 98:638–653).
Unabridged references: [Holmgren et al. 1976 Brittonia 28:255–262]
1. Subshrub; leaves entire or 3–4-lobed; disk corolla yellow-white; receptacle glabrous ..... S. cana
1' Perennial from long, thick woody caudex; leaves 1–3-pinnately divided; disk corolla yellow; receptacle with white curly hairs 0.5–1 mm ..... S. potentilloides
2. Sts nearly leafless; basal leaves generally 1-pinnately divided; heads 1–3(4) ..... var. nitrophila
2' Sts leafy; basal leaves generally 2–3-pinnately divided; heads (3)4–20 ..... var. potentilloides
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.