This section is from the book "Field Book Of Western Wild Flowers", by Margaret Armstrong. Also available from Amazon: Field Book Of Western Wild Flowers.
A pretty little plant, a few inches tall, more or less downy all over, with very slender, reddish, branching stems and light green leaves, about an inch across and thin in texture. The flowers are over half an inch across, with clear yellow petals, often tinged with pale red on the outside, yellow anthers and a green pistil. The capsules are long and downy.

Yellow Wood-sorrel-Oxalis cornlculata. GERANIUM FAMILY. Gcraniaceae.
 
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