Regularity: Regularly occurring
Global Range: The range for this species in Oregon is predominantly Josephine and Curry Counties with one location just across the Curry County border in southern Coos County. In California it is currently found in Butte, Del Norte, Humboldt, Mendocino, Marin (extinct there), Plumas, Shasta, Siskiyou, Sonoma and Trinity Counties. The population in Marin County was washed away (Coleman 1989).
Comments: Riparian areas, seepy sites, bogs and other wet areas on serpentine substrate.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 21 - 300
Comments: There are 62 records for Oregon although the Oregon Natural Heritage Program stopped actively computer tracking this species in 1991. It is unknown how many of these have been destroyed since many of these records were from surveys during the pre-timber sale processing. The California Natural Diversity Database has assigned this species to the Watch List and does not actively computer track it. There is a stack of potential EO sources 4" thick in the file.
Life History and Behavior
Molecular Biology and Genetics
Barcode data: Cypripedium californicum
Statistics of barcoding coverage: Cypripedium californicum
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
National NatureServe Conservation Status
Rounded National Status Rank: N3 - Vulnerable
NatureServe Conservation Status
Rounded Global Status Rank: G3 - Vulnerable
Reasons: Although total population numbers seem to be fairly high (10,000+ individuals), this species is restricted in habitat (serpentine) and limited in range to southwestern Oregon and northern California. Its habitat and range are subject to logging and mining. It is at least somewhat collectable. In addition, many of the reports are from pre-timber sales survey, and it is unknown what happened to the populations after the harvesting activities.
Environmental Specificity: Very narrow. Specialist or community with key requirements scarce.
Comments: Usually found in serpentine seeps.
Global Short Term Trend: Decline of 10-30%
Comments: This used to read that pop trends were stable. But, in 2005, CNDDB modified this to indicate that due to collecting, logging activities and other threats, the trend is slightly down. Several CA pops have been revisited and not found.
Global Long Term Trend: Unknown
Degree of Threat: Low
Comments: Populations occur in areas that could be logged and mined. The serpentine wetland habitats where it occurs are vulnerable to disturbance. Collecting does happen.
The California lady's slipper (Cypripedium californicum) is a member of the orchid genus Cypripedium, the lady's slipper orchids. It is native to the western United States, where it has a very restricted range and can only be found in the mountains of southwestern Oregon (Kalmiopsis Wilderness) and northern California. It prefers the margins of woodland streams in open coniferous forests.
It often grows in very large clumps and each stem can bear up to 21 flowers. It can grow to be up to over a meter in height and has alternate, plicate leaves the length of the stem. The petals and sepals tend to be greenish-brown while the small pouch is pure white with occasional pink spots.
- Rankou, H. (2014) Cypripedium californicum. In: IUCN 2014. IUCN Red List of Threatened Species. Version 2014.1.
- Cypripedium californicum A. Gray. California lady's slipper. US Department of Agriculture
- Biota of North America Program, county distribution map. bonap.net
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