Home/Species/ Needleleaf Fleabane

Erigeron nematophyllus

Rydb.

Needleleaf Fleabane

G4Apparently Secure Found in 3 roadless areas NatureServe Explorer →

G4Apparently SecureGlobal Rank

UnknownThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.129676

Element CodePDAST3M2S0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single nation

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderAsterales

FamilyAsteraceae

GenusErigeron

Other Common Names

needleleaf fleabane (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.

Conservation Status

Rank Method Rank calculation - Biotics v2

Review Date2024-02-13

Change Date2024-02-13

Edition Date2024-02-13

Edition AuthorsNEIGHBOURS, M.L. (1987), rev. Eberly (2024)

Threat ImpactUnknown

Range Extent20,000-200,000 square km (about 8000-80,000 square miles)

Number of Occurrences81 - 300

Rank Reasons

Erigeron nematophyllus is a perennial herb that occurs in the western United States from the plains and hills of southern Wyoming, northwestern Colorado, northeastern Utah. This regional endemic is known from between 100 and 200 known occurrences. Threats and trends are unknown.

Range Extent Comments

Erigeron nematophyllus occurs in the western United States from the plains and hills of southern Wyoming, northwestern Colorado, northeastern Utah. Range extent was estimated at a minimum of 120,000 sq km using herbarium specimens collected between 1983 and 2024 (GBIF 2024, iNaturalist 2024, SEINet 2024).

Occurrences Comments

By applying a 1 km separation distance to herbarium records and photo-based observations documented between 1983 and 2024, it is estimated that there are between 81 and 300 occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024).

Ecology & Habitat

Habitat

This species grows on ridges or at the bases of cliffs in shale gravel, often Green River shale, or rocky areas, often on sandstone, in sagebrush, mountain brush, yellow pine, and pinyon-juniper at elevations of 1,700–2,900 m asl.

Terrestrial Habitats

Woodland - ConiferShrubland/chaparralGrassland/herbaceous

Other Nations (1)

United StatesN4

Province	Rank	Native
Colorado	S3	Yes
Wyoming	S4	Yes
Utah	S3	Yes

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)No

Roadless Areas (3)

Colorado (1)

Area	Forest	Acres
Dome Peak	Routt NF	35,716

Wyoming (2)

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

References (5)

Flora of North America Editorial Committee (FNA). 2006b. Flora of North America north of Mexico. Vol. 20. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford Univ. Press, New York. xxii + 666 pp.
Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
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.
Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).