Globally critically imperiled (G1) (Source: NatureServe)

Classification
Within iNaturalist.org

All Names

  • Scientific names
    • Calochortus tiburonensis
  • English
    • Tiburon mariposa lily

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Recent observations

Photos

Square

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

invertboy

Date

May 27, 2013 10:22 AM PDT

Photos

Square

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

robberfly

Date

May 24, 2013 11:51 AM PDT

Place

256–298 Westward Dr, Corte Madera, California, US (Google, OSM)

Description

Endemic Calachortus sp.

Photos

Square

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

hikingtony

Date

May 15, 2013 05:22 PM PDT

Description

Should be blooming soon!

Photos

4560610425_2cd30ffaa4_s

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

tapbirds

Date

May 31, 2005

Photos

4659677819_05ddb22fec_s

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

eric_hunt

Date

May 31, 2010 01:57 PM PDT

Description

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

Photos

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

kueda

Date

Jun 12, 2010 10:54 AM PDT

Description

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!

Photos

3560215936_902731526e_s

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

tomhilton

Date

May 24, 2009 08:03 AM PDT

Description

Calochortus tiburonensis, a rare and endangered species that grows only on Ring Mountain in Tiburon. More info here.

Photos

3563461496_65db398325_s

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

tomhilton

Date

May 24, 2009 08:04 AM PDT

Photos

3563461380_0ee5090c8b_s

What

Tiburon mariposa lily Calochortus tiburonensis

Observer

tomhilton

Date

May 24, 2009 08:04 AM PDT
View all observations

Description from Wikipedia

Calochortus tiburonensis (also known as the Tiburon Mariposa Lily) is a rare member of the genus Calochortus in the family Liliaceae. It was first brought to the attention of science in 1971, and written up in the botanical literature in 1973. Calochortus tiburonensis is endemic to a single serpentine outcrop in California's Marin County. It grows on serpentine-derived soil atop this outcrop in grasslands from 0-200 m. on Ring Mountain. It is considered threatened due to...

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Conservation Summary

  • Globally
    Critically imperiled (G1) (Source: NatureServe)
    Critically Imperiled. Narrowly endemic to serpentine grasslands on a single summit on the Tiburon Peninsula in Marin County, California. The single population is located within a preserve.
  • United States
    Critically imperiled (N1) (Source: NatureServe)
    • California, US
      Critically imperiled (S1.2) (Source: NatureServe)
      1B.1 (Source: CNPS)
      California Native Plant Society, California Rare Plant Rank 1B.1: Plants Rare, Threatened, or Endangered in California and Elsewhere - Seriously threatened in California