Endemic Calachortus sp.
Should be blooming soon!
Species endemic and restricted to Ring Mountain Open Space Preserve, Tiburon, Marin County, California
Common name: Tiburon mariposa lily
CNPS Inventory of Rare and Endangered Plants on list 1B.1 (rare, threatened, or endangered in CA and elsewhere). It is listed by the State of California as Threatened and by the Federal Government as Threatened
Photographed at Ring Mountain Open Space Preserve, Tiburon, Marin County, California
Second time trying to find this flower proved successful. They really are strange little things, in addition to being insanely rare (they only grow on Ring Mountain, I believe). They're fairly unassuming from a distance, brownish yellow, the same color as the surrounding grass, but they just get weirder and weirder as you draw closer.
To the woman I met along the trail: hike the Phyllis Ellman Trail, and look out for weird little brown flowers!
Calochortus tiburonensis, a rare and endangered species that grows only on Ring Mountain in Tiburon. More info here.
Calochortus tiburonensis, the Tiburon Mariposa Lily, is a rare member of the genus Calochortus in the family Liliaceae. It is endemic to Marin County, California, where it is known only from one population on Ring Mountain. There it occurs on a single serpentine outcrop in grasslands from 50–150 metres (160–490 ft) in elevation....