Roadless Areas
Home/Species/ Broad Fleabane

Erigeron latus

(A. Nels. & J.F. Macbr.) Cronq.

Broad Fleabane

G3Vulnerable Found in 1 roadless area NatureServe Explorer →
G3VulnerableGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.157073
Element CodePDAST3M270
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusErigeron
Other Common Names
broad 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
Review Date2025-02-24
Change Date2001-04-03
Edition Date1997-09-11
Edition AuthorsNiese, J., rev. Mancuso (1996), KMW-NVHP (1997), rev. Soteropoulos (2025)
Threat ImpactUnknown
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Erigeron latus is a perennial herb restricted to thin volcanic substrates often with sagebrush or sagebrush-juniper that is endemic to a small area in southeastern Oregon, southwestern Idaho, and northern Nevada. There are estimated to be over 21 occurrences which face threats from range improvement for livestock and cattle, road maintenance, and invasive species. Little is known about trends, and monitoring of populations should be conducted to improve our understanding of reproduction, plant abundance, threats, and trends, as well as continuing conservation measures to protect the taxon.
Range Extent Comments
Erigeron latus is endemic to a small area in southeastern Oregon (Malheur County), southwestern Idaho (Cassia, Owyhee, and Twin Falls counties), and northern Nevada (Elko County) (FNA 2006, Hagwood 2006, OSU 2025). Range extent was estimated to be 12,663 square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1994 and 2025 (RARECAT 2024, GBIF 2025, iNaturalist 2025, NatureServe 2025, SEINet 2025).
Occurrences Comments
By applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1994 and 2025, it is estimated that there are over 21 occurrences rangewide (RARECAT 2024, GBIF 2025, iNaturalist 2025, NatureServe 2025, SEINet 2025).
Threat Impact Comments
Although threats are not widely documented, this species is threatened by range improvement for livestock and cattle, road maintenance, invasive species (including cheatgrass), and other threats in some places, though there is insufficient data, including anecdotal accounts, to understand scope and severity of threats for this species (NatureServe 2025). Additional threats may include nearby logging, mining, and recreational activities (Moseley and Mancuso 1993).
Ecology & Habitat

Habitat

Erigeron latus grows on "flat to gently sloping, open sites with shallow, gravelly soils over bedrock, volcanic sands and cinder, often with sagebrush or sagebrush-juniper, rhyolitic riparian areas" (FNA 2006).
Terrestrial Habitats
Woodland - ConiferShrubland/chaparral
Palustrine Habitats
Riparian
Other Nations (1)
United StatesN3
ProvinceRankNative
IdahoS3Yes
NevadaS1Yes
OregonS1Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureUnknownUnknownHigh (continuing)
2.3 - Livestock farming & ranchingUnknownUnknownHigh (continuing)
4 - Transportation & service corridorsUnknownModerate or 11-30% pop. declineHigh (continuing)
4.1 - Roads & railroadsUnknownModerate or 11-30% pop. declineHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesUnknownUnknownHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesUnknownUnknownHigh (continuing)
8.1.1 - Unspecified speciesUnknownUnknownHigh (continuing)

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (1)
Nevada (1)
AreaForestAcres
McaffieHumboldt-Toiyabe National Forest26,110
References (14)
  1. Cronquist, A. 1994. Asterales. In A. Cronquist, A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren. Intermountain flora: Vascular plants of the Intermountain West, U.S.A. Vol. 5. New York Botanical Garden, Bronx. 496 pp.
  2. 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.
  3. Global Biodiversity Information Facility (GBIF). 2025. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2025).
  4. Hagwood, S. 2006. Field Guide to the Special Status Plants of the Bureau of Land Management, Twin Falls District, Jarbidge Field Office Area. Idaho Technical Bulletin 2006-01. Bureau of Land Management, Idaho State Office. BLM/ID/GI-06/009+1150. Online. Available: https://www.blm.gov/sites/blm.gov/files/documents/files/Library_Idaho_TechnicalBulletin2006-01.pdf (Accessed 2021).
  5. iNaturalist. 2025. Online. Available: https://www.inaturalist.org (accessed 2025).
  6. Kartesz, J.T. 1988. A flora of Nevada. Ph.D. dissertation. Univ. of Nevada, Reno. 3 volumes. 1729 pp.
  7. 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.
  8. Moseley, R.K., and M. Mancuso. 1993. Report on the conservation status of <i>Erigeron latus</i> in Idaho. Unpublished report prepared for U.S. Fish and Wildlife Service, Region 1, Idaho Department of Fish and Game, Boise, Idaho.
  9. Mozingo, H.N., and M. Williams. 1980. The threatened and endangered plants of Nevada. U.S. Fish and Wildlife Service and Bureau of Land Management, Portland, OR. 268 pp.
  10. NatureServe. 2025. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  11. Nesom, G.L. 1992. Erigeron and Trimorpha (Asteraceae: Astereae) of Nevada. Phytologia 73(3): 186-202.
  12. Oregon State University (OSU). 2025. Oregon Flora website. Oregon State University Herbarium at Oregon State University. Online. Available: https://oregonflora.org/ (accessed 2025).
  13. Southwest Environmental Information Network (SEINet). 2025. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2025).
  14. Steele, B., F. Johnson, and S. Brunsfeld, eds. 1981. Vascular plant species of concern in Idaho. Forest, Wildlife and Range Experiment Station, Moscow, ID. 161 pp.