Jepson Flora Project: Jepson Interchange    

 
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©Copyright 1993 by the Regents of the University of California
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OXALIDACEAE

OXALIS FAMILY

Robert Ornduff

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 3–5, placentas axile, styles 1–5, generally ± free
Fruit: generally capsule, loculicidal
Seeds generally with aril
Genera in family: 8 genera, 575 species: especially temp. Often heterostylous.

OXALIS

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 69:257–309; Lourteig 1975 Phytologia 42:57–197]
Generally heterostylous; many (especially aliens in CA except O. laxa ) fine ornamental; some noxious weeds; contained oxalates may be toxic to livestock.

Introduced

O. purpurea L.

Perennial; bulbs ovoid, dark brown, gummy
Stem 0 or very short
Leaves < 8, in basal rosette; petiole < 5 cm; leaflets < 4 cm, hairy on lower surface, drying with dark spots, streaks
Inflorescence: flowers solitary; peduncle 1–11 cm, bracts 2, at or below peduncle middle
Flower: sepals < 1 cm, ± lanceolate, hairy; petals < 2.5 cm, purple to red, salmon, or white
Fruit 0 in CA
Ecology: Waste places, especially near gardens
Elevation: < 100 m.
Bioregional distribution: North Coast, San Francisco Bay Area
Distribution outside California: native to s Africa
Synonyms: O. variabilis Jacq
Fls late winter to early spring. Cult as ornamental.

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bioregional map for OXALIS%20purpurea being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Oxalis purpurea
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Overlay Consortium of California Herbaria specimen data by county on this map
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