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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.
Perennial herb, taprooted, cushion-forming, generally coarsely hairy or tomentose. Stem: 0. Leaf: basal-most bladeless sheaths; distal blades narrowly ovate to round, pinnately or ternately dissected, segments lanceolate or oblong. Inflorescence: umbels compound, head-like, spheric or hemispheric; peduncles spreading; bracts 0; involucel 1-sided, bractlets fused to ± free; rays few to many, spreading to spreading-ascending; fertile pedicels short, sterile > fruit. Flower: bisexual, staminate, or sterile; calyx lobes conspicuous or not; petals spoon-shaped or oblanceolate, generally white or yellow, or purple in age, early-deciduous, tips narrowed; ovary tip projection 0. Fruit: ovate to round, ± compressed side-to-side to cylindric, hairy; ribs ± equal, thread-like; oil tubes several per rib-interval; fruit axis divided to base. Seed: face deeply grooved.
3 species: high mountains of California Floristic Province. (Greek: mountain dwarf) [Shevock & Norris 1981 Fremontia 9:22–25]
1. Herbage white-tomentose; umbels hemispheric; corolla yellow or maroon; anthers yellow; calyx lobes inconspicuous, obscured by hairs ..... O. vestita
1' Herbage gray-hairy; umbels spheric; corolla white; anthers purple; calyx lobes conspicuous, spreading
2. Flowers appearing ± with leaf blades; bladeless sheaths 0.5–2 cm; umbels 1–3 cm diam; rays 5–15, 2–8 mm; calyx lobes yellow ..... O. clementis
2' Flowers appearing before leaf blades; bladeless sheaths 3–6 cm; umbels 2.4–4.5 cm diam; rays 20–35, 5–15 mm; calyx lobes purple ..... O. purpurascens
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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