Is this Diogenes' lantern (Calochortus amabilis) ?
Many blooming around the Preserve today.
Calochortus amabilis is a species of flowering plant in the lily family which is known by the common name Diogenes' lantern. It is endemic to northern California, where it grows in the mountains north of the San Francisco Bay Area. In oak woodlands common understory plant associates are Calochortus luteus, Clarkia unguiculata and Delphinium variegatum. It is a common member of the scrub and woodland flora there. This is a perennial herb producing an upright, somewhat...