E-Flora BC: Electronic Atlas of the Flora of British Columbia

Oxalis stricta L.
upright yellow oxalis (common yellow oxalis)
Oxalidaceae (Wood-Sorrel family)

Introduction to Vascular Plants

© Reg Newman  Email the photographer   (Photo ID #12220)

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Distribution of Oxalis stricta
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Species Information

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Perennial herb from a slender rhizome; stems erect, sometimes prostrate and matted, simple, few to several, smooth or hairy, 10-50 cm tall/long.
Basal leaves lacking; stem leaves alternate, long-stalked, clover-like, the blades 1-5 cm long, the leaflets broadly heart-shaped, folded towards each other, smooth or the margins hairy.
Inflorescence of 2-7 flowers on smooth or hairy stalks 5-15 cm long; petals yellow, 4-9 mm long, entire; sepals 2-5 mm long.
Capsules, oblong, 8-15 mm long, sparsely long-hairy, the hairs with partitions; seeds egg-shaped, 0.8-1.2 mm long, cross-ridged.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist disturbed areas and ditches in the lowland zone; rare in the lower Fraser Valley; introduced from the U.S.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Ceratoxalis coloradensis (Rydb.) Lunell
Ceratoxalis cymosa (Small) Lunell
Oxalis bushii (Small) Small
Oxalis coloradensis Rydb.
Oxalis cymosa Small
Oxalis europaea Jord.
Oxalis europaea var. bushii (Small) Wieg.
Oxalis europaea var. rufa (Small) Young
Oxalis fontana Bunge
Oxalis fontana var. bushii (Small) Hara
Oxalis interior (Small) Fedde
Oxalis rufa Small
Oxalis stricta var. decumbens Bitter
Oxalis stricta var. piletocarpa Wieg.
Oxalis stricta var. rufa (Small) Farw.
Oxalis stricta var. villicaulis (Wieg.) Farw.
Xanthoxalis bushii Small
Xanthoxalis coloradensis (Rydb.) Rydb.
Xanthoxalis cymosa (Small) Small
Xanthoxalis dillenii var. piletocarpa (Wieg.) Holub
Xanthoxalis interior Small
Xanthoxalis rufa (Small) Small
Xanthoxalis stricta (L.) Small
Xanthoxalis stricta var. piletocarpa (Wieg.) Moldenke

Taxonomic and Nomenclatural Links

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General References