CNPS

CNPS Rare Plant Inventory



Species Details

Eriogonum giganteum var. compactum

Santa Barbara Island buckwheat

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  Classification

Scientific Name:
Eriogonum giganteum Wats. var. compactum Dunkle
Common Name:
Santa Barbara Island buckwheat
Family: Polygonaceae
Element Code: PDPGN082A1
USDA Plants Symbol: ERGIC
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.3
Fed List: None
State List: CR (1979-11-01)
Global Rank: G3T2
State Rank:
 S2
Other Status: SB_CalBG/RSABG; SB_USDA
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2024-08-06

  Ecology and Life History

Lifeform: perennial deciduous shrub
Blooming Period: May-Aug(Sep)
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Elevation:
10 - 300 meters
35 - 985 feet
General Habitats:
  • Coastal bluff scrub (usually rocky)
Microhabitat Details:
Microhabitat:

  Notes

Notes:
Known from fewer than 10 occurrences, but population numbers are increasing. Threatened by non-native plants. See Bulletin of the Southern California Academy of Sciences 41:130 (1943) for original description, and Phytologia 66(4):318-319 (1989) for taxonomic treatment.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 3
Total EOs % of EOs
EOs with Threat Listed: 3 75 %
THREAT LIST:
Erosion/runoff 2 50%
Foot traffic/trampling 1 25%
Other 1 25%

  Occurrence Data from the CNDDB

Total Occurrences: 4
Element Occurrence Ranks:
A B C D X U
0 3 0 0 0 1
Occurrence Status:
Historical >20 Years 4
Recent <=20 Years 0
Presence:
Presumed Extant 4
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Santa Barbara (SBA)
Quads: Name (Quad Code)
Santa Barbara Island (3311848)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 30 December 2024].
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