|Constance's coyote-thistle, Loch Lomond button-celery, Loch Lomond coyote-thistle|
The following Participating Institutions are custodians for this species in the CPC National Collection:
Rancho Santa Ana Botanic Garden
University of California Botanical Garden
The conservation of Eryngium constancei is fully sponsored.
Holly Forbes contributed to this Plant Profile.
Loch Lomond button-celery is a low-growing annual herb with tiny white to light purple flowers found only in northern California. This species grows in the bed of a small vernal lake, surrounded by a ponderosa pine and black oak forest, in the Loch Lomond Ecological Reserve in Lake County. Another population of Loch Lomond button-celery was discovered in 1996 in two spring-fed, shallow pools in Sonoma County. A berm has been built to prevent runoff into the pools at this location from increased sedimentation due to logging in the area. A third population was discovered in Lake County in 1997. This population was threatened by soil erosion into its pool habitat due to vegetation removal along the edges; it is also at risk from planned reservoir construction (CDFG 2002).
Distribution & Occurrence
Vernal lakes and pools.
|It is known only from three populations in two vernal lakes in Lake County and two pools in Sonoma County. As with any annual species, the number of plants in each population varies from year to year. During good years there may be thousands of plants in each population (CDFG 2002).|
Conservation, Ecology & Research
Erosion caused by logging
(CDFG 2002; USFWS 1993)
protection from runoff