Lesquerella gordoni  Common Bladderpod
EPHEMERAL ANNUAL.  Entire hillsides may glow bright yellow for a week or two in April when this ubiquitous plant blooms.  Stems long, sprawling.  Seedpods are spherical.  Common on rocky slopes after wet winters.  Sometimes placed in genus Physaria.
FAMILY:  Brassicaceae  (Mustard Family)