Home/Species/ Prostrate Buckwheat

Eriogonum prociduum

Reveal

Prostrate Buckwheat

G3Vulnerable Found in 2 roadless areas NatureServe Explorer →

G3VulnerableGlobal Rank

Identity

Unique IDELEMENT_GLOBAL.2.152427

Element CodePDPGN084W0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single nation

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderPolygonales

FamilyPolygonaceae

GenusEriogonum

Synonyms

Eriogonum prociduum var. prociduum

Other Common Names

prostrate buckwheat (EN)

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Taxonomic Comments

This record is for the narrow treatment of Eriogonum prociduum, following Grady and Reveal (2011) which excludes var. mystrium as a variety of E. crosbyae. Kartesz (1994) recognized E. prociduum before Reveal (2004) described and in FNA (2005) recognized var. mystrium as a variety of it and may have recognized those specimens as part of a broader E. prociduum, but since that is not clearly documented (and Reveal (2004) indicates confusion over identification), this record assumes the narrow treatment. A record was never created in this system for the broader treatment.

Conservation Status

Review Date1997-11-25

Change Date1996-08-26

Edition Date1996-07-30

Edition AuthorsVrilakas, Sue (1996), rev. D. Gries (1997)

Range Extent250-20,000 square km (about 100-8000 square miles)

Number of Occurrences21 - 80

Rank Reasons

Eriogonum prociduum is endemic to the vicinity of the common state boundaries of Oregon, California, and Nevada. Threats exist from off-road vehicle use, recreational developments, and mining. Although it is locally abundant, the species appears to have strict edaphic requirements, and so would be unable to adapt to a new location should its present habitats be destroyed.

Range Extent Comments

Modoc and Lassen Counties in California, Lake County, Oregon and Modoc County, Nevada. Very specific habitat requirements makes range expansion doubtful.

Occurrences Comments

11 occurrences in California, 13 occurrences in Oregon and 1 in Nevada (Kaye 1990).

Threat Impact Comments

Potential threats include recreation, trampling, mining and grazing.

Ecology & Habitat

Habitat

Basalt flows and occasionally on barren volcanic tuff. Elevation ranging from 4600-8320 feet. Associated vegetation cover is low.

Terrestrial Habitats

Barrens

Other Nations (1)

United StatesN3

Province	Rank	Native
Nevada	S1	Yes
Oregon	S1	Yes
California	S3	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (2)

California (2)

Area	Forest	Acres
Dry	Modoc National Forest	7,726
Knox Mtn.	Modoc National Forest	5,975

References (9)

Flora of North America Editorial Committee (FNA). 2005. Flora of North America north of Mexico. Vol. 5. Magnoliophyta: Caryophyllidae: Caryophyllales, Polygonales, and Plumbaginales. Oxford Univ. Press, New York. vii + 656 pp.
Grady, B.R., and J.L. Reveal. 2011. New combinations and a new species of Eriogonum (Polygonaceae: Eriogonoideae) from the Great Basin Desert, United States. Phytotaxa 24:33-38.
Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
Kartesz, J.T. 1988. A flora of Nevada. Ph.D. dissertation. Univ. of Nevada, Reno. 3 volumes. 1729 pp.
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Kaye, T., W. Messinger, S. Massey, S. Kephart, and D. Flanagan. 1990. Eriogonum crosbyae and E. prociduum: Inventory, Reproduction, and Taxonomic Assessment. Oregon Dept. of Agriculture, Salem, OR. Unpublished document on file at ONHDB and ODA.
Meinke, R.J. 1982. Threatened and Endangered Vascular Plants of Oregon: An Illustrated Guide. U.S. Fish and Wildlife Service, Region 1, Portland, Oregon. 326 pp.
Reveal, J.L. 2004. New entities in Eriogonum (Polygonaceae: Eriogonoideae). Phytologia 86(3): 121-159.
Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.