Home/Species/ Brewer's Fleabane

Erigeron klamathensis

(Nesom) Nesom

Brewer's Fleabane

G3Vulnerable Found in 10 roadless areas NatureServe Explorer →

G3VulnerableGlobal Rank

UnknownThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.721377

Element CodePDAST3M0P7

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single nation

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderAsterales

FamilyAsteraceae

GenusErigeron

Synonyms

Erigeron breweri var. klamathensisNesom

Concept Reference

Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.

Taxonomic Comments

In the 2006 FNA treatment, Nesom recognizes Erigeron klamathensis as a species, distinct from E. breweri. Other treatments have recognized it as E. breweri var. klamathensis.

Conservation Status

Rank Method Rank calculation - Biotics v2

Review Date2023-02-14

Change Date2023-02-14

Edition Date2023-02-14

Edition AuthorsTomaino, A. (2004), rev. Eberly (2023)

Threat ImpactUnknown

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

Number of Occurrences21 - 80

Rank Reasons

Erigeron klamathensis is a perennial herbe of the western United States, where it is found in northern California and south central Oregon. There are around 50 occurrences, including historical records. Historical occurrences should be surveyed to determine if plants are extant. All occurrences should be monitored to gather baseline information on plant abundance, threats, and site conditions. There are multiple occurrences on U.S. Forest Service Lands.

Range Extent Comments

Erigeron klamathensis occurs in the western United States, where it is found in Klamath and High Cascade Range of northern California and south central Oregon (FNA 2006, Jepson Flora Project 2023).

Occurrences Comments

There are 50 occurrences estimated based on a 1 km separation distance (CCH2 2023, GBIF 2023, NatureServe 2023). Most occurrences are in California with less than ten in Oregon.

Threat Impact Comments

A number of occurrences are on U.S. Forest Service Land and within designated Wilderness Areas and a Botanical Area, which may provide protection from some types of threats (Smith 2018).

Ecology & Habitat

Habitat

This species grows rocky slopes, ridges, crevices of shale, granite, serpentine, or peridotite at elevations of (400)700 to 2,200 m. It can occur in openings within chaparral, oak-pine, fir-oak, or mixed evergreen woodlands (FNA 2006, Jepson Flora Project 2023).

Terrestrial Habitats

Woodland - ConiferWoodland - MixedShrubland/chaparralBare rock/talus/scree

Other Nations (1)

United StatesN3

Province	Rank	Native
California	SNR	Yes
Oregon	S2	Yes

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)No

Roadless Areas (10)

California (8)

Area	Forest	Acres
Blue Creek Rare I	Six Rivers National Forest	12,134
Condrey Mtn.	Klamath National Forest	2,923
Indian Creek	Klamath National Forest	5,011
Kangaroo	Klamath National Forest	40,617
Russian	Klamath National Forest	21,771
Siskiyou	Klamath National Forest	54,039
Siskiyou B	Six Rivers National Forest	18,871
Snoozer	Klamath National Forest	23,414

Oregon (2)

Area	Forest	Acres
North Kalmiopsis	Siskiyou National Forests	91,560
South Kalmiopsis	Siskiyou National Forests	104,477

References (9)

CCH2 Portal. 2023. Consortium of California Herbaria. Online. Available: https//:www.cch2.org/portal/index.php (accessed 2023).
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). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2023).
Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
Jepson Flora Project (eds.) 2023. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2023).
Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
Kartesz, J.T. 2003. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. Draft April 2003 (including county distribution). North Carolina Botanical Garden, Chapel Hill, N.C.
NatureServe. 2023. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
Smith, James P., Jr. 2018. Vascular Plants of Cook and Green Pass, Siskiyou County. Botanical Studies 77.