Taxon Report

Eryngium constancei Sheikh

Loch Lomond button-celery

Print Report


Taxon Summary

Eryngium constancei, commonly known as Loch Lomond button-celery, is a annual/perennial herb in the Apiaceae that is found only in California. It occurs within Vernal pools, growing at elevations from 460 to 855 meters. Eryngium constancei is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.


  Classification

Scientific Name:
Eryngium constancei Sheikh
Common Name:
Loch Lomond button-celery
Family: Apiaceae
Element Code: PDAPI0Z0W0
USDA Plants Symbol: ERCO39
Synonyms/Other Names:

Ecology and Life History

Lifeform: annual/perennial herb
Blooming Period: Apr-Jun Apr-Jun
Elevation: 460-855 (1510-2805)
General Habitats: Vernal pools
Microhabitat:
Microhabitat Details:

Occurrence Data from the CNDDB

Total Occurrences: 4
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 2
   Fair (C) 0
   Poor (D) 1
   None (X) 0
   Unknown (U) 1
California Endemic:  True
California Counties and Islands: Name (Code)
Lake (LAK), Sonoma (SON)
Quads: Name (Quad Code)
Calistoga (3812255), Clearlake Highlands (3812286), Whispering Pines (3812276)

Threat List Data from the CNDDB

Threat List Total: 7
EOs with Threat Listed: Total EOs % of EOs
3 75 %
Erosion/runoff 2 50%
Logging 1 25%
ORV activity 1 25%
Road/trail construction/maint. 1 25%
Surface water diversion 1 25%
Agriculture 1 25%
Development 1 25%

Notes

Known only from three occurrences. Threatened by development and vehicles. Protected in part at Loch Lomond ER (DFG), but entire watershed not protected; previously damaged by dredging of vernal lake. See MadroƱo 30(2):93-101 (1983) for original description.
Threats:
Taxonomy:
Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 1 April 2025].