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.
Pretty little plants, often growing in quantities among rocks in mountain canyons. The slender stems are from a few inches to over a foot tall, springing from a cluster of root-leaves, varying a good deal in shape, dull-green and harsh to the touch. The flowers are half an inch or more across, with white petals, often tinged with pink, with a little yellow in the throat, and form a pretty, rather flat-topped cluster.

White Bladder-pod- Lesquerella purpurea. CAPER FAMILY. Capparidaceae.
 
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