redwood sorrel

Oxalis smalliana

Member of palmate-leaved oxalis (subgenus Oxalis)
woodsorrels (genus Oxalis)
woodsorrel family (family Oxalidaceae)
dicots (class Magnoliopsida)
pale purple, pink in flowering plants

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• stem ± 0
• leaf: < 10, clustered at rhizome tips
• petiole < 20 cm, hairy
• leaflets < 4 cm, often ± purple abaxially, midribs pale
• Inflorescence: peduncle < 15 cm; bracts 2, near tip
• sepals < 1 cm, lanceolate
• petals < 2.5 cm, white to deep pink
• ± undisturbed forests

I’m waiting for iNaturalist to transition my older observations from the original name, O. oregana to the new name, O. smalliana.

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: 33 (all are research grade)

Locations:

• Purisima Creek Redwoods OSP: 6
• El Corte de Madera OSP: 5
• Butano SP: 3
• Russian Ridge OSP: 3
• Sam McDonald CP: 3
• Big Basin SP: 2
• Mt. Madonna SP: 2
• Nisene Marks SP: 2
• Pescadero Creek CP: 2
• Garrapata SP
• Huddart CP
• Portola Redwoods SP
• Sanborn CP
• Wilder Ranch SP

Months:

• Feb.: 1
• Mar.: 4
• Apr.: 3
• May: 9
• Jun.: 4
• Jul.: 6
• Aug.: 5
• Sep.: 1

For more details, use advanced search.

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

Bay Area species: iNaturalist – Calflora