Bob Rutemoeller found this beautiful wildflower on the Point Arena - Stornetta Lands recently. It's Coastal Onion, also called Magenta Wild Onion, Allium dichlamydeum.
This wildflower is a member of the Lily family. The flower head has many small flowers and the stem is quite thick. They grow about 3 to 5 inches tall on coastal bluffs. And, yes, they do have an onion smell!
Thanks to Bob for allowing me to share his photo with you here.