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Key to families | Table of families and genera
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, perennial herb, subshrub, shrub. Leaf: opposite or alternate, simple to deeply divided or compound, sessile or petioled. Inflorescence: heads radiate, discoid or disciform, 1 or in cyme-like clusters; peduncle short or long; involucre cylindric, hemispheric, or bell-shaped; phyllaries in 2–3 ± equal series, linear to ovate; receptacle flat to conic, epaleate. Ray flower: ray yellow or white. Disk flower: 5–200; corolla yellow or white, 4-lobed; anther tips triangular; style tips tapered. Fruit: linear to oblanceolate, flat, sometimes weakly 3–4-angled; face dark brown or black, glabrous or puberulent, margins generally ± thick, puberulent to strongly ciliate; pappus 0 or a crown of fringed scales and 0–2 slender bristles.
66 species: southwestern North America, South America. (Greek: around the margin, from thick fruit margin) [Yarborough & Powell 2006 FNANM 21:317–334]
1. Annual (rarely short-lived perennial herb); heads generally radiate ..... P. emoryi
1' Perennial herb or generally subshrubs; heads discoid
2. Herbage generally long-hairy
3. Leaf serrate to serrate-lobed; leaves opposite or alternate ..... P. inyoensis
3' Leaf entire or each margin with 1–3 short, pointed lobes; leaves alternate ..... P. villosa
2' Herbage short-rough-hairy
4. Heads 2–6 in tight clusters; peduncle 1–10 mm; leaf blade linear, generally entire (rarely 3-lobed) ..... P. intricata
4' Heads 1 or 2–3 in loose clusters; peduncle 10–45(80) mm; leaf blade generally elliptic or lanceolate to widely ovate or round (sometimes linear in Perityle megalocephala var. oligophylla), entire, serrate or lobed ..... P. megalocephala
5. Leaves many, lance-ovate to ± round, 4–9 mm wide ..... var. megalocephala
5' Leaves few, linear to lanceolate, 1–4 mm wide ..... var. oligophylla
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].
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