Home/Species/ Dropleaf Buckwheat

Eriogonum exilifolium

Reveal

Dropleaf Buckwheat

G3Vulnerable Found in 4 roadless areas NatureServe Explorer →

G3VulnerableGlobal Rank

MediumThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.157285

Element CodePDPGN08250

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single nation

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderPolygonales

FamilyPolygonaceae

GenusEriogonum

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.

Conservation Status

Rank MethodLegacy Rank calculation - Excel v3.1x

Review Date2018-11-19

Change Date1996-06-26

Edition Date2018-12-28

Edition AuthorsK. Maybury/W. Fertig (1996), rev. A. Tomaino (2018)

Threat ImpactMedium

Range Extent5000-20,000 square km (about 2000-8000 square miles)

Number of Occurrences21 - 80

Rank Reasons

A regional endemic of Wyoming and Colorado. Locally common. Threats include development, range improvements and livestock grazing, and off-road vehicle use.

Range Extent Comments

Eriogonum exilifolium is a regional endemic of south-central Wyoming (Albany and Carbon counties) and adjacent north-central Colorado (Grand, Jackson, and Larimer counties) (Flora of North America Editorial Committee 2005).

Occurrences Comments

There are approximately 13 extant occurrences in Wyoming, and 11 in Colorado (NatureServe Network Database as of October 2018).

Threat Impact Comments

"Threats are relatively low" (Fertig 2000). In order of decreasing priority, threats include "residential and commercial development, range improvements (modifications to rangeland intended to improve forage yield for livestock), off-road vehicle use, other recreational uses, grazing, energy development, reservoir creation, right-of-way management, coal mining, exotic species invasion, effects of small population size, disease, declining pollinators, fire, global climate change, and pollution" (Anderson 2006).

Ecology & Habitat

Habitat

Known from clay hills and flats or granitic sandy slopes, mixed grassland and sagebrush communities, at 2200-2600 m elevation (Flora of North America Editorial Committee 2005).

Terrestrial Habitats

Shrubland/chaparralGrassland/herbaceous

Other Nations (1)

United StatesN3

Province	Rank	Native
Wyoming	S2	Yes
Colorado	S3	Yes

Threat Assessments

Threat	Scope	Severity	Timing
1 - Residential & commercial development	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
2 - Agriculture & aquaculture	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
2.3 - Livestock farming & ranching	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
3 - Energy production & mining	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
4 - Transportation & service corridors	Restricted - small	Moderate - slight	—
6 - Human intrusions & disturbance	Restricted - small	Moderate or 11-30% pop. decline	—
6.1 - Recreational activities	Restricted - small	Moderate or 11-30% pop. decline	—
7 - Natural system modifications	Restricted (11-30%)	Moderate or 11-30% pop. decline	—
8 - Invasive & other problematic species, genes & diseases	Restricted - small	Moderate - slight	—
8.1 - Invasive non-native/alien species/diseases	Restricted - small	Moderate - slight	—
9 - Pollution	Small (1-10%)	Slight or 1-10% pop. decline	—
11 - Climate change & severe weather	Large (31-70%)	Slight or 1-10% pop. decline	—

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (4)

Colorado (1)

Area	Forest	Acres
Dome Peak	Routt NF	35,716

Wyoming (3)

Area	Forest	Acres
Bear Mountain	Medicine Bow-Routt National Forest	9,440
Middle Fork	Medicine Bow-Routt National Forest	13,238
Sheep Mountain	Medicine Bow-Routt National Forest	17,626

References (7)

Anderson, D.G. 2006. January 27 last update. <i>Eriogonum exilifolium </i>Reveal (dropleaf buckwheat): a technical conservation assessment. USDA Forest Service, Rocky Mountain Region. Online. Available: https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5206851.pdf (accessed 19 November 2018).
Dorn, R.D. 1977. Manual of the vascular plants of Wyoming. 2 vols. Garland Publishing, Incorporated, New York. 1498 pp.
Dorn, R.D. 1988. Vascular plants of Wyoming. Mountain West Publishing, Cheyenne, WY. 340 pp.
Fertig, W. 2000. December 21 last update. <i>Eriogonum exilifolium </i>State Species Abstract, Wyoming Natural Diversity Database. Online. Available: http://www.uwyo.edu/wyndd/_files/docs/reports/speciesabstracts/eriogonum_exilifolium.pdf (accessed 19 November 2018).
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.
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.
Weber, W.A. 1990. Colorado Flora: eastern slope. Univ. Press Colorado, Niwot. 396 pp.

Eriogonum exilifolium

Habitat

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