Calochortus umbellatus explained

Calochortus umbellatus is a flowering plant in the lily family found only in California in the United States.^{[1] [2]} The common name for this species is Oakland mariposa lily or Oakland star-tulip.

Distribution

The species is a California endemic of limited distribution.^[3] It grows primarily in the San Francisco Bay Region, often on serpentine soils,^[4] with a few isolated populations in Humboldt, Mendocino, and Nevada Counties.^[5]

Description

Calochortus umbellatus is a branching perennial herb up to 25 cm tall. Inflorescence is sub-umbellate with 3-10 white or pale pink flowers.^[6]

This species is included on the California Native Plant Society list 4.2 of rare and endangered plants.^[7]

Notes and References

1. https://www.biodiversitylibrary.org/page/26306287#page/176/mode/1up Wood, Alphonso 1868. Proceedings of the Academy of Natural Sciences of Philadelphia 20(6): 168
2. http://www.tropicos.org/Name/18401580 Tropicos, Calochortus umbellatus Alph. Wood
3. Jepson Manual (1993) published by the University of California, Berkeley
4. Web site: The Jepson Herbarium.
5. http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=1311 Calflora taxon report, University of California @ Berkeley, Calochortus umbellatus Wood Oakland mariposa lily, Oakland star tulip
6. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242101500 Flora of North America, Vol. 26 Page 127 Oakland star-tulip Calochortus umbellatus Alph. Wood
7. http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=1311 Calflora (2008) Calochortus umbellatus