Jepson eFlora: Taxon page
Vascular Plants of California
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Oxalis californica
CALIFORNIA WOOD-SORREL


Higher Taxonomy
Family: OxalidaceaeView Description 
Common Name: OXALIS FAMILY
Habit: 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[15], fused below, of 2 lengths; pistil 1, ovary superior, chambers [3]5, placentas axile, styles [1]5, generally +- free. Fruit: generally capsule, loculicidal. Seed: generally arilled.
Genera In Family: 5 genera, number of species uncertain: especially temperate. Note: Often heterostylous.
eFlora Treatment Author: Robert E. Preston & Robert Ornduff
Scientific Editor: Thomas J. Rosatti.
Genus: OxalisView DescriptionDichotomous Key


Habit: 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.
Species In Genus: 500--950 species: especially temperate. Etymology: (Greek: sour, from acidic taste) Note: 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 CCo (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.
Reference: Lourteig 2000 Bradea 7:201--629
Unabridged Reference: Eiten 1963 Amer Midl Naturalist 69:257--309; Lourteig 1975 Phytologia 42:57--1979; Turner 1994 Phytologia 77:1--7
Oxalis californica (Abrams) R. Knuth
NATIVE
Habit: Perennial herb; taproot +- woody, generally > 4 mm diam; bulbs 0. Stem: < 40 cm, decumbent to erect, not rooting at nodes, hairs generally sparse, appressed or arched upward. Leaf: cauline; petiole < 7 cm; leaflets < 1.5 cm, appressed-hairy. Inflorescence: 1--3-flowered; pedicel 2--3 cm, sparsely appressed-hairy. Flower: sepals 3--7 mm, ovate, purple-tinged, tip ciliate; petals generally 8--12 mm, yellow-orange, drying +- red. Fruit: 10--15 mm, < 2 × pedicel, hairs simple, short, appressed, rarely multicellular.
Ecology: Coastal scrub, chaparral; Elevation: < 2035 m. Bioregional Distribution: SW (exc SnBr, SnJt); Distribution Outside California: Baja California. Flowering Time: Feb--Jun Note: Probably closely related to Oxalis pilosa.
Synonyms: Oxalis albicans Kunth subsp. californica (Abrams) G. Eiten
Jepson eFlora Author: Robert E. Preston & Robert Ornduff
Reference: Lourteig 2000 Bradea 7:201--629
Unabridged Reference: Eiten 1963 Amer Midl Naturalist 69:257--309; Lourteig 1975 Phytologia 42:57--1979; Turner 1994 Phytologia 77:1--7
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Citation for this treatment: Robert E. Preston & Robert Ornduff 2012, Oxalis californica, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=35600, accessed on September 22, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on September 22, 2019.

Oxalis californica
click for enlargement
© 2013 Keir Morse
Oxalis californica
click for enlargement
© 2013 Keir Morse
Oxalis californica
click for enlargement
© 2014 Steve Matson
Oxalis californica
click for enlargement
© 2013 Keir Morse
Oxalis californica
click for enlargement
© 2013 Keir Morse
Oxalis californica
click for enlargement
© 2013 Keir Morse

More photos of Oxalis californica in CalPhotos



Geographic subdivisions for Oxalis californica:
SW (exc SnBr, SnJt)
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map of distribution 1
(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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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.