Panorama of the San Marcos Foothills Preserve
Plants of the San Marcos Foothills Preserve

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Oxalis pilosa (Hairy wood sorrel)

Uncommon native herbaceous perennial known from only one location on the Preserve (riparian oak woodland near the main trail crossing of Atascadero Creek). Flowers are yellow. Blooms in spring. This species looks similar to the non-native Oxalis pes-caprae, which is more common and has larger flowers.

Oxalis pilosa (Hairy Wood Sorrel). NATIVE. Pictured in spring.


Oxalis pilosa (Hairy Wood Sorrel). NATIVE. Pictured in spring.