Taxon Report

Eriogonum intrafractum Cov. & Mort.

jointed buckwheat

Print Report


Taxon Summary

Eriogonum intrafractum, commonly known as jointed buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Mojavean desert scrub, growing at elevations from 610 to 1950 meters. Eriogonum intrafractum is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.


  Classification

Scientific Name:
Eriogonum intrafractum Cov. & Mort.
Common Name:
jointed buckwheat
Family: Polygonaceae
Element Code: PDPGN08360
USDA Plants Symbol: ERIN5
Synonyms/Other Names:

Ecology and Life History

Lifeform: perennial herb
Blooming Period: May-Oct May-Oct
Elevation: 610-1950 (2000-6400)
General Habitats: Mojavean desert scrub
Microhabitat:
Microhabitat Details:

Occurrence Data from the CNDDB

Total Occurrences: 14
Element Occurrence Ranks:
   Excellent (A) 2
   Good (B) 2
   Fair (C) 0
   Poor (D) 1
   None (X) 0
   Unknown (U) 9
California Endemic:  True
California Counties and Islands: Name (Code)
Inyo (INY)
Quads: Name (Quad Code)
Echo Canyon (3611646), Fall Canyon (3611772), Grotto Canyon (3611751), Panamint Butte (3611743), Thimble Peak (3611771), Wahguyhe Peak (3611781), Wildrose Peak (3611731)

Threat List Data from the CNDDB

Threat List Total: 6
EOs with Threat Listed: Total EOs % of EOs
4 29 %
Grazing 2 14%
Non-native animal impacts 1 7%
Non-native plant impacts 1 7%
Other 1 7%
Over-collecting/poaching 1 7%
Foot traffic/trampling 1 7%

Notes

See Journal of the Washington Academy of Sciences 26:305 (1936) for original description, and Phytologia 66(4):359 (1989) for taxonomic treatment.
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 4 February 2025].