Photo: Diane Edwardson, May 25, 2013. While the non-native, invasive weeds are dry and awaiting brush clearance, the natives are blooming on the Red Car Property. (Click on photo to enlarge.)
Jimsonweed (Datura wrightii) is native, attracts really big moths and is a hallucinogenic. According to Wikipedia, it's poisonous.
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.