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Calochortus tiburonensis; photograph (c) Isaac Krone, some rights reserved (CC BY) CC BY(c) Isaac Krone, some rights reserved (CC BY) · observed growing wild · 2026-05-23

Calochortus tiburonensis A.J.Hill

Tiburon mariposa lily

Liliaceae · California · listed by its family as a bulb, tuber or caudex

No habitat climate
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Calochortus tiburonensis, photograph (c) wildflowerwatching, some rights reserved (CC BY)Calochortus tiburonensis, photograph (c) wildflowerwatching, some rights reserved (CC BY)Calochortus tiburonensis, photograph (c) Rupert Clayton, some rights reserved (CC BY)Calochortus tiburonensis, photograph (c) Rupert Clayton, some rights reserved (CC BY)Calochortus tiburonensis, photograph (c) Rupert Clayton, some rights reserved (CC BY)Calochortus tiburonensis, photograph (c) Rupert Clayton, some rights reserved (CC BY) 55 photographs ›

Summary

Calochortus tiburonensis, the Tiburon mariposa lily, is a rare member of the genus Calochortus in the family Liliaceae. It is only grows in Marin County, California, where it is known only from one population on Ring Mountain east of Mill Valley.

Quoted from Wikipedia, "Calochortus tiburonensis", CC BY-SA 4.0.

Cultivation

Grouped as a bulb, tuber or caudex, listed under the family Liliaceae in the archetype table, and Kew describes it as “bulbous geophyte”.

Nothing derived: no habitat climate for this species.
How this section is made

Each card states this species' habitat figures with their sources, and what two fixed rules read from them; nothing here says what the plant does, wants or tolerates. The rules · the terms.

Group. Listed under the family Liliaceae in the archetype table, and Kew describes it as “bulbous geophyte”. A group is taken only where Kew's description of the species agrees with the table's listing. The table gives no figure and no prose; the cold floor is the habitat's alone.

Climate across the habitat

No habitat climate can be derived: Only 2 distinct land cells of the climate grid hold an in-range record placed to within 10 km; three are needed for an envelope. 1256 of the 1261 in-range records are placed to worse than 10 km, or to no stated accuracy and fewer than three decimals or by something other than a person's observation, and cannot place a climate cell, though they count for the map and its marker.

Natural habitat

Native range as published by WCVP; the marker is where the records are densest and decides nothing.
Openly licensed records inside the range, framed on where they fall.
NativeCalifornia · regions are the level-3 units of the World Geographical Scheme for Recording Plant Distributions, as Kew's World Checklist records ranges, some under historical names such as Yugoslavia or Czechoslovakia (how).
Map marker37.895, -122.501 · in the densest population, 1261 records (100% of those in range)
Kew's description“bulbous geophyte” · “temperate” · quoted from WCVP, RBG Kew (CC BY 4.0); not derived here
Evidence usedThe map marker rests on all 1261 georeferenced records inside the native range; the map shows only the 300 openly licensed ones, which alone would put the marker 1 km away. No climate across the range is derived for this species. 1256 in-range records are placed to worse than 10 km, or with no stated accuracy (admitted only as a person's observation to three decimals), and stay on the map but off the climate.
How this section is made
The map marker: the openly licensed record nearest the middle of the densest 1° population of the 1261 in-range records; it decides nothing. Records outside the native range, living specimens and records marked introduced are not used; which records count.

Photographs

Calochortus tiburonensis, photograph 1did not loadCalochortus tiburonensis, photograph 2did not loadCalochortus tiburonensis, photograph 3did not loadCalochortus tiburonensis, photograph 4did not loadCalochortus tiburonensis, photograph 5did not loadCalochortus tiburonensis, photograph 6did not load

Photographs: (c) wildflowerwatching, some rights reserved (CC BY) (2); (c) Rupert Clayton, some rights reserved (CC BY) (4).

Other Calochortus 34 in the reference

Calochortus albus Calochortus albus White globe-lily Photo: CC BY, Konshau DumanCalochortus amabilis Calochortus amabilis Diogenes' lantern Photo: CC BY, wildflowerwatchingCalochortus amoenus Calochortus amoenus Purple fairy-lantern Photo: CC0, author not statedCalochortus apiculatus Calochortus apiculatus Pointed-tip mariposa lily Photo: CC BY, Daughter DadCalochortus argillosus Calochortus argillosus Clay mariposa lily Photo: CC0, author not statedCalochortus aureus Calochortus aureus Golden mariposa lily Photo: CC BY, Martin PurdyCalochortus barbatus Calochortus barbatus Liliaceae Photo: CC BY, Víctor Manuel Vargas MatusCalochortus bruneaunis Calochortus bruneaunis Bruneau mariposa lily Photo: CC BY, glittergravelCalochortus catalinae Calochortus catalinae Catalina mariposa-lily Photo: CC0, author not statedCalochortus clavatus Calochortus clavatus Clubhair mariposa lily Photo: CC0, author not statedCalochortus eurycarpus Calochortus eurycarpus White mariposa lily Photo: CC BY, Todd PattersonCalochortus flexuosus Calochortus flexuosus Winding mariposa lily Photo: CC BY, Johnny C all 35 ›

Names & registers

GBIFPOWOIPNIWFOWikidataWikipediaiNaturalist

The record

Family
Liliaceae
Described by
A.J.Hill
Native to
California
Wild records
1261 in range · 300 open

Every figure here is derived from public data by a stated rule and names its source; nothing about this species is written for its page by a person or by AI, apart from the marked, credited quotations. How →

Where this page came from built 2026-10-21
GBIF species record gbif.species answeredasked 2026-10-21
GBIF synonyms gbif.synonyms answeredasked 2026-10-21
GBIF common names gbif.vernacular answeredasked 2026-10-21names fetched 2026-10-21
WCVP native range wcvp.distribution answeredas of 2026-06-04
GBIF occurrence records gbif.occurrences answeredas of 2026-10-21GBIF occurrence download https://doi.org/10.15468/dl.hbdw64, of 2026-10-21; 39 records within 1 km of a botanic garden, herbarium or zoo left out (20 at a botanic garden or arboretum, 19 at a zoo; Wikidata's list)
Habitat climate climate nothing to reportasked 2026-10-21only 2 distinct land cells of the climate grid hold an in-range record placed to within 10 km; three are needed for an envelope
Wikidata wikidata answeredasked 2026-10-21
Wikipedia wikipedia answeredasked 2026-10-21
iNaturalist photographs, wild inat.photos.wild answeredasked 2026-10-22from iNaturalist's open data of 2026-09-27: research-grade observations with an open-licence photograph, the 24 whose photographs iNaturalist received last (the open data holds no votes); filled 2026-10-22
iNaturalist photographs, cultivated inat.photos.cultivated not asked
GBIF media gbif.media answeredasked 2026-10-21
OpenAlex papers openalex not askednot yet asked for this reference; a later fill takes the papers from OpenAlex's snapshot

Every source is recorded as having answered, reported nothing, refused, failed, not been asked, or answered twice where one answer is taken (“not taken: two items answered”), and, for a source asked when this page was built, when: the figures are as the source held them that day; a source read from a file (Kew's World Checklist, a GBIF download) says "as of" the file's day instead; a row carried from an earlier build of the page names that build instead. Only “nothing to report” is ever shown as an absence. Records came from 6 datasets via GBIF.org; each carries its own licence.

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