Taxon Details

Eriogonum congdonii

Congdon's buckwheat

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Steve Matson 2014

Sierra Pacific Industries 2011

Taxon Summary:

Eriogonum congdonii, commonly known as Congdon's buckwheat, is a perennial deciduous shrub in the Polygonaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 800 to 2345 meters. Eriogonum congdonii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Eriogonum congdonii (S. Stokes) Rev.
Common Name: Congdon's buckwheat
Family:	Polygonaceae
Element Code:	PDPGN081A0
USDA Plants Symbol:	ERCO19
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S4
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-12-09

Ecology and Life History

Lifeform: perennial deciduous shrub

Blooming Period: (May)Jun-Aug(Sep)

Elevation:
800 - 2345 meters
2625 - 7695 feet

General Habitats:

Lower montane coniferous forest (serpentinite)

Microhabitat Details:

Microhabitat:

Openings
Rocky
Serpentine

Notes

Notes: Possibly threatened by logging. See Aliso 7(2):220 (1970) for original description, and Phytologia 66(4):349 (1989) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	0 %

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					0
A	B	C	D	X	U
0	0	0	0	0	0

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	0

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Shasta (SHA), Siskiyou (SIS), Trinity (TRI)

Quads: Name (Quad Code)
Billys Peak (4112227), Bully Choop Mtn. (4012257), Caribou Lake (4112218), Carrville (4112216), Chicken Hawk Hill (4112214), China Mtn. (4112245), Covington Mill (4012287), Damnation Peak (4012285), Deadman Point (4112384), Grizzly Peak (4112128), Hanland Peak (4012283), Ironside Mtn. (4012374), Lamoine (4012284), Lewiston (4012267), Mount Eddy (4112234), Mumbo Basin (4112225), Schell Mtn. (4012275), Scott Mountain (4112236), Seven Lakes Basin (4112224), Shoeinhorse Mtn. (4112211), Siligo Peak (4012288), South China Mtn. (4112235), Tangle Blue Lake (4112226), Thurston Peaks (4012382), Tombstone Mtn. (4112213), Whiskeytown (4012265), Whisky Bill Peak (4112215), Ycatapom Peak (4112217)

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

CNPS Rare Plant Inventory