|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Annual to tree
Leaves compound (palmate, pinnate, or leaflet 1), alternate, often ± basal in rosettes or in clusters at stem or rhizome tips, generally petioled; stipules generally 0; leaflets generally sessile
Inflorescence: cyme, sometimes umbel- or raceme-like, or flowers solitary, generally in axils; peduncle bracted
Flower generally bisexual, radial; sepals 5, free or fused at base; petals 5, free or fused above base; stamens 10 or 15, fused below, of 2 lengths; pistil 1, ovary superior, chambers 35, placentas axile, styles 15, generally ± free
Fruit: generally capsule, loculicidal
Seeds generally with aril
Genera in family: 8 genera, 575 species: especially temp. Often heterostylous.
Annual, perennial herb, shrub; roots fibrous or woody; bulbs, tubers, or rhizomes often present
Stem sometimes 0 or very short
Leaf petioled: stipules 0 or small; leaflets 3, generally ± obcordate in CA, generally entire, generally green
Flower: petals clawed; stamens 10; ovary chambers 5, styles 5, free, erect or curved
Fruit cylindric to spheric, explosively dehiscent
Seeds flat, often ridged; aril translucent
Species in genus: ± 480 species: especially temp
Etymology: (Greek: sour)
Reference: [Eiten 1963 Amer Midl Nat 69:257309; Lourteig 1975 Phytologia 42:57197]
Generally heterostylous; many (especially aliens in CA except O. laxa ) fine ornamental; some noxious weeds; contained oxalates may be toxic to livestock.
Perennial; taproot ± woody; bulbs 0
Stem < 40 cm, ± trailing, not rooting at nodes, glabrous or hairy
Leaves cauline; petiole < 7 cm; leaflets < 1.5 cm
Inflorescence 13-flowered; pedicel < 2 cm
Flower: sepals < 6 mm, lanceolate; petals generally 812 mm, yellow
Fruit 618 mm, cylindric
Ecology: Coastal grassland and scrub, chaparral
Elevation: < 700 m.
Bioregional distribution: North Coast, Outer North Coast Ranges, Central Coast, San Francisco Bay Area, Outer South Coast Ranges, South Coast, Channel Islands, Western Transverse Ranges
Distribution outside California: to Texas, n Mexico
Fls spring, summer; confused with, perhaps same sp. as O. corniculata.
Stem: hairs 0 or generally curled
Ecology: Coastal scrub, chaparral
Elevation: < 700 m.
Bioregional distribution: South Coast, Channel Islands
Distribution outside California: Baja California