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Vascular Plants of California
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Oxalis corniculata


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 corniculata L.
NATURALIZED
Habit: 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.
Ecology: Disturbed areas; Elevation: generally < 1900 m. Bioregional Distribution: NCoRO, n&c SNF, GV, CCo, SnFrB, SCo, PR, expected elsewhere; Distribution Outside California: worldwide; native to Mediterranean Europe. Toxicity: Possibly TOXIC in quantity to sheep. Flowering Time: +- all year
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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Botanical illustration including Oxalis corniculata

botanical illustration including Oxalis corniculata

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Citation for this treatment: Robert E. Preston & Robert Ornduff 2012, Oxalis corniculata, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=35609, accessed on May 27, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on May 27, 2019.

Oxalis corniculata
click for enlargement
© 2011 Neal Kramer
Oxalis corniculata
click for enlargement
© 2003 Michael Charters
Oxalis corniculata
click for enlargement
© 2019 Neal Kramer
Oxalis corniculata
click for enlargement
© 2011 Neal Kramer
Oxalis corniculata
click for enlargement
© 2019 Neal Kramer
Oxalis corniculata
click for enlargement
© 2019 Neal Kramer

More photos of Oxalis corniculata in CalPhotos



Geographic subdivisions for Oxalis corniculata:
NCoRO, n&c SNF, GV, CCo, SnFrB, SCo, PR, expected elsewhere
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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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Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
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.