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Key to families | Table of families and genera
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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 northern 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; rhizome slender; bulbs < 2 cm, pale brown, beaked. Stem: erect, branched, < 30 cm, glabrous; axils often with bulblets. Leaf: cauline, in whorl-like clusters of < 10, lower opposite or not; petiole 2–7 cm; leaflets < 1.5 cm. Inflorescence: flowers 1; peduncle < 7 cm; bracts 2, near middle. Flower: sepals < 6 mm, oblong, acute, tips with 2 orange tubercles; petals < 2 cm, white to pale pink. Fruit: 0 in California.
Shady woodland; < 400 m. North Coast, San Francisco Bay Area; native to southern Africa. Ornamental, escaping cultivated. Mar–Jun [Online Interchange]
Previous taxon: Oxalis corniculata
Next taxon: Oxalis micrantha
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 22 2014
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=35636, accessed on Jul 22 2014
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