Calochortus greenei - S. Wats.
Greene's Mariposa Lily
Taxonomic Status: Accepted
Related ITIS Name(s): Calochortus greenei S. Wats. (TSN 42826)
Unique Identifier: ELEMENT_GLOBAL.2.149528
Element Code: PMLIL0D0H0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Lily Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Liliales Liliaceae Calochortus
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Calochortus greenei
Conservation Status
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NatureServe Status

Global Status: G3
Global Status Last Reviewed: 22Aug2005
Global Status Last Changed: 22Aug2005
Rounded Global Status: G3 - Vulnerable
Reasons: Endemic to the Siskiyou Mountains of southwestern Oregon and northern California. Known from approximately 80 sites and approximately over 31,000 plants. The main threats include grazing, non native invasives and perhaps collecting and orv's. There are at least some protected sites in Oregon.
Nation: United States
National Status: N3

U.S. & Canada State/Province Status
United States California (S2S3), Oregon (S3)

Other Statuses

Comments on USESA: Was previously a candidate, but was removed from candidacy on February 28, 1996 in a notice of review.
U.S. Fish & Wildlife Service Lead Region: R1 - Pacific

NatureServe Global Conservation Status Factors

Range Extent Comments: Endemic to the Siskiyou Mountains of southwestern Oregon (Jackson County) and Modoc and Siskiyou counties, California. Range in California estimated at about 1620 sq mi.

Area of Occupancy: 26-2,500 4-km2 grid cells
Area of Occupancy Comments: About 440 acres occupied in California and a small number of acres in Oregon.

Number of Occurrences: 21 - 300
Number of Occurrences Comments: 50 occurrences (47 recent) in California and 35 in Oregon as of 2006.

Population Size Comments: California populations have an estimated 24,625 plants. Oregon estimates their plant numbers at about 10,000.

Number of Occurrences with Good Viability/Integrity: Many (41-125)
Viability/Integrity Comments: 41 ranked good to excellent in California; 6 in Oregon as of 2005.

Overall Threat Impact: Very high - high
Overall Threat Impact Comments: California populations are threatened by grazing, timber harvest (few), development (few), ORV's, and invasive weeds. All of Oregon's populations are small with direct threats.

Short-term Trend: Decline of 10-30%
Short-term Trend Comments: The short term trend is probably downwards for this plant, though not steeply so.

Long-term Trend: Unknown
Long-term Trend Comments: Long term trend is unknown.

Intrinsic Vulnerability Comments: Sensitive to domestic and wildlife grazing. Horticultural collecting may be a threat.

Environmental Specificity: Moderate. Generalist or community with some key requirements scarce.
Environmental Specificity Comments: The habitat includes cismontane woodland, meadows and seeps, pinyon and juniper woodland, upper montane coniferous forest. Substrate is often volcanic. Elevation : 1035-1890m.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Endemic to the Siskiyou Mountains of southwestern Oregon (Jackson County) and Modoc and Siskiyou counties, California. Range in California estimated at about 1620 sq mi.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States CA, OR

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CA Siskiyou (06093)
OR Jackson (41029), Klamath (41035)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
17 Middle Rogue (17100308)+
18 Upper Klamath (18010206)+, Shasta (18010207)+, Sacramento headwaters (18020005)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: An herb from a deeply buried (perennial) bulb. The stout stems reach 3 dm tall and bear showy, lilac-colored flowers from May-July.
Terrestrial Habitat(s): Forest/Woodland, Savanna, Shrubland/chaparral, Woodland - Conifer
Habitat Comments: Open Oregon white oak (Quercus garryana) savannahs, buckbrush (Ceanothus spp., usually C. cuneatus) chapparal, and (rarely) openings in Ponderosa pine-western juniper (Pinus ponderosa-juniperus occidentalis) woodlands. Usually associated with native bunchgrasses.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 12Aug2005
NatureServe Conservation Status Factors Author: Soper, C., and N. Fredricks, R. Bittman 2005

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • California Department of Fish and Game. 2000. Natural Diversity Database (RareFind 2), Version 2.1.2, January 25, 2000. Downloaded in 2003.

  • California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA. x + 388pp.

  • Flora of North America Editorial Committee. 2002a. Flora of North America North of Mexico. Vol. 26. Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York. xxvi + 723 pp.

  • Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Meinke, R.J. 1982. Threatened and Endangered Vascular Plants of Oregon: An Illustrated Guide. U.S. Fish and Wildlife Service, Region 1, Portland, Oregon. 326 pp.

  • Peck, M.E. 1961. A manual of the higher plants of Oregon. 2nd edition. Binsford & Mort, Portland, Oregon. 936 pp.

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