creeping woodsorrel

Oxalis corniculata

Member of common yellow woodsorrels (section Corniculatae)
palmate-leaved oxalis (subgenus Oxalis)
woodsorrels (genus Oxalis)
woodsorrel family (family Oxalidaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

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CalPhotos
leaf

CalPhotos
red spots

• 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
• sepals < 4.5 mm, linear to narrowly ovate
• petals generally < 8 mm, oblong to spoon-shaped, yellow, sometimes with red spots below middle

Toxicity of fire fern, lady's sorrel, oxalis, sorrel, shamrock (Oxalis spp.):
2b – These plants contain oxalate crystals but they do not cause immediate problems. These plants have tiny crystals that lodge in the kidneys and can cause kidney damage as well as nausea, vomiting and diarrhea.

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Chris’s observations: none

Taxon info: iNaturalist – Calflora – CalPhotos – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora