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Annual, perennial herb [vine, shrub, tree]. Leaf: compound (palmate [pinnate, or leaflet 1]), alternate, often ± basal in rosettes or at stem or rhizome tips in clusters, generally petioled, stipules generally 0, leaflets generally sessile. Inflorescence: cyme, umbel- or raceme-like or not, or flowers 1, 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, fused below, of 2 lengths; pistil 1, ovary superior, chambers 5, placentas axile, styles 5, generally ± free. Fruit: generally capsule, loculicidal. Seed: generally arilled.
5 genera, number of species uncertain: especially temperate. [Matthews & Endress 2003 Bot J Linn Soc 140:321–381] Often heterostylous. —Scientific Editor: Thomas J. Rosatti.
Roots fibrous or woody; bulbs, tubers, or rhizomes often present. Stem: ± 0 or not. Leaf: stipules 0 or small; leaflets 3, generally ± obcordate [not], generally entire, generally green. Flower: petals clawed; styles erect or curved. Fruit: cylindric to spheric, explosively dehiscent. Seed: flat, often ridged; aril translucent.Key to Oxalis
500–950 species: especially temperate. (Greek: sour, from acidic taste) [Lourteig 2000 Bradea 7:201–629] Taxonomy difficult, needs study; generally heterostylous; many (especially aliens in California except Oxalis micrantha) ornamental; some noxious weeds; oxalates may be TOXIC to livestock; Oxalis latifolia Kunth possibly naturalized in Central Coast (Keil 30389, just north of San Simeon), differs from Oxalis purpurea in having flowers in umbel-like cyme; Oxalis hirta L. an historical waif (no recent collections), excluded.
Unabridged references: [Eiten 1963 Amer Midl Naturalist 69:257–309; Lourteig 1975 Phytologia 42:57–1979; Turner 1994 Phytologia 77:1–7]
Perennial herb; taproot fibrous, generally < 4 mm diam, bulbs 0. Stem: rooting at nodes, < 50 cm, hairs appressed to spreading. Leaf: cauline; petiole < 7 cm; leaflets < 2 cm, ciliate, hairs generally 0 adaxially, sparse, appressed abaxially. Inflorescence: cyme, ± umbel-like or not, 2–7-flowered; pedicel < 1 cm, hairs appressed. Flower: sepals < 4.5 mm, linear to narrowly ovate; petals generally < 8 mm, oblong to spoon-shaped, yellow, often with red spots below middle. Fruit: 6–25 mm, cylindric, ± angled, hairs simple, short, generally appressed.
Disturbed areas; generally < 1900 m. Outer North Coast Ranges, n&c Sierra Nevada Foothills, Great Central Valley, Central Coast, San Francisco Bay Area, South Coast, Peninsular Ranges, expected elsewhere; worldwide; native to Mediterranean Europe. Possibly TOXIC in quantity to sheep. ± all year [Online Interchange]
Previous taxon: Oxalis californica
Next taxon: Oxalis incarnata
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 28 2015
Citation for this treatment: [Author of taxon treatment] 2013. Oxalis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=35609, accessed on Jul 28 2015
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|Geographic subdivisions indicated for the distribution of Oxalis corniculata|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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