Photo: Diane Edwardson, March 5, 2015. We usually don't see native Jimsonweed blooming on the Red Car Property until everything else has dried up. (Click on photo to enlarge.)
However, CalFlora shows Datura wrightii blooming February through October.
CalFlora also no longer lists its toxicity, but Wiki does. California Poison Control lists Datura species as highly toxic.
Disclaimer: The Corralitas Red Car Property Blog prefers to quote reliable sources, such as CalFlora and California Poison Control
on the issue of toxicity. We often get email suggesting some plants
are edible. If you are eating your way through the Red Car Property, we
DO NOT recommend you eat any plant you find in the Red Car Property neighborhood without first doing your own research.