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Home/Species/ Western Joepye-weed

Ageratina occidentalis

(Hook.) King & H.E. Robins.

Western Joepye-weed

G4Apparently Secure Found in 106 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.154076
Element CodePDASTBX0M0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusAgeratina
Synonyms
Eupatorium occidentaleHook.
Other Common Names
Western Snakeroot (EN) western snakeroot (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 Date1987-09-29
Change Date1987-09-29
Range Extent Comments
Central WA, ID, and w. MT, south to CA and UT. Peripheral.
Ecology & Habitat

Description

Western Boneset is a rhizomatous perennial herb with clustered stems that are often woody at the base and 15-70 cm tall. The alternate leaves are triangular or ovate in outline and 2-7 cm long with toothed margins. The lower leaves are reduced and early deciduous. The lower leaf surfaces have small, unstalked glands. The flowering heads are borne in an open, branched inflorescence. The involucral bracts are 3-5 mm long and mostly equal in length. The heads lack ray flowers, and there are 9-21 purple or pink disk flowers in each head. The top of the achene bears a tuft of numerous fine bristles.

Diagnostic Characteristics

This species could be confused with BRICKELLIA GRANDIFLORA or SAUSSUREA AMERICANA, but both of these have involucral bracts in many rows of different lengths.
Other Nations (1)
United StatesNNR
ProvinceRankNative
UtahS1Yes
IdahoSNRYes
WashingtonSNRYes
OregonSNRYes
CaliforniaSNRYes
NevadaS3Yes
MontanaS2Yes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (106)
California (83)
AreaForestAcres
Bell QuinbyShasta-Trinity National Forest11,556
Big Butte ShinboneMendocino National Forest4,265
BlackKlamath National Forest6,530
Bonanza KingShasta-Trinity National Forest16,402
Bucks LakePlumas National Forest680
Callahan FlowModoc National Forest6,618
Caples CreekEldorado National Forest17,854
Carson - IcebergStanislaus National Forest56,430
Castle Crags AShasta-Trinity National Forest113
Castle Crags BShasta-Trinity National Forest1,619
Castle PeakTahoe National Forest14,974
ChinquapinShasta-Trinity National Forest22,040
Chips CreekPlumas National Forest12,940
Cow CreekShasta-Trinity National Forest22,627
Cow CreekSix Rivers National Forest1,271
Coyote SoutheastInyo National Forest53,159
CypressLassen National Forest3,380
DardanellesEldorado National Forest8,110
Dinkey LakesSierra National Forest34,171
DomeStanislaus National Forest11,085
East YubaTahoe National Forest17,968
Granite ChiefTahoe National Forest6,546
Grouse LakesTahoe National Forest19,085
Hall Natural AreaInyo National Forest5,236
Heart LakeLassen National Forest9,349
Hoover - Mt.olsenHumboldt-Toiyabe National Forest624
Hoover - NorthHumboldt-Toiyabe National Forest1,574
Hoover - Virginia LksHumboldt-Toiyabe National Forest5,050
Horse Mdw.Inyo National Forest5,687
HortonInyo National Forest5,717
Iceberg - Mill CreekHumboldt-Toiyabe National Forest26,988
IshiLassen National Forest21,805
KangarooKlamath National Forest40,617
KellySix Rivers National Forest5,195
Kings RiverSierra National Forest52,999
Lake EleanorShasta-Trinity National Forest397
LavasModoc National Forest25,864
Little French CShasta-Trinity National Forest11,529
Log Cabin SaddlebagInyo National Forest15,165
Middle ForkPlumas National Forest29,278
Middle YubaTahoe National Forest7,379
Mill CreekLassen National Forest7,587
MosesSequoia National Forest22,077
Mt. EddyShasta-Trinity National Forest7,232
Mt. HoffmanModoc National Forest9,780
Mt. LassicSix Rivers National Forest6,643
Mt. OlsenInyo National Forest2,161
Mt. Shasta AShasta-Trinity National Forest676
Mt. Shasta BShasta-Trinity National Forest2,809
NightStanislaus National Forest3,173
North Fork American RiverTahoe National Forest38,495
North Fork SmithSix Rivers National Forest37,898
North LakeInyo National Forest2,406
Orleans Mtn.Klamath National Forest49,090
Orleans Mtn. CSix Rivers National Forest15,589
PaiuteInyo National Forest58,712
PattisonShasta-Trinity National Forest29,299
Pilot CreekSix Rivers National Forest9,192
Poison HoleEldorado National Forest2,627
PyramidEldorado National Forest24,347
Rock Creek WestInyo National Forest3,626
RussianKlamath National Forest21,771
San JoaquinSierra National Forest22,474
SherwinInyo National Forest3,140
Silver HillHumboldt-Toiyabe National Forest4,423
SiskiyouKlamath National Forest54,039
Siskiyou BSix Rivers National Forest18,871
SnoozerKlamath National Forest23,414
Snow MountainMendocino National Forest14,457
Snow MountainLassen National Forest2,165
SoldierModoc National Forest10,102
Table Mtn.Inyo National Forest4,215
Timbered CraterLassen National Forest4,096
TinemahaInyo National Forest27,060
Tragedy - Elephants BackEldorado National Forest20,866
Trail LakeLassen National Forest1,124
Ukonom CreekKlamath National Forest4,621
UnderwoodSix Rivers National Forest6,591
West YubaTahoe National Forest16,059
West YubaPlumas National Forest6,071
Wheeler RidgeInyo National Forest15,744
Wilderness ContiguousMendocino National Forest3,606
Wonoga Pk.Inyo National Forest11,272
Idaho (1)
AreaForestAcres
Italian PeakCaribou-Targhee National Forest141,158
Nevada (8)
AreaForestAcres
Arc Dome - OphirHumboldt-Toiyabe National Forest5,652
Humboldt - Angel LkHumboldt-Toiyabe National Forest1,008
Mystic (NV)Humboldt-Toiyabe National Forest5,644
Rose - Big MeadowsHumboldt-Toiyabe National Forest311
Rose - Davis Mdw.Humboldt-Toiyabe National Forest2,361
Rose - GalenaHumboldt-Toiyabe National Forest3,711
Ruby - Lamoille CynHumboldt-Toiyabe National Forest32,771
Toiyabe RangeHumboldt-Toiyabe National Forest99,225
Oregon (10)
AreaForestAcres
Boulder ParkWallowa-Whitman National Forest12,141
Brown Mt.Winema National Forest3,117
Lick CreekWallowa-Whitman National Forest1,956
Little Eagle MeadowsWallowa-Whitman National Forest6,984
Mcclellan MountainMalheur National Forest21,213
Mt. Hood AdditionsMt. Hood National Forest13,061
SherwoodUmpqua National Forest2,449
Twin LakesMt. Hood National Forest6,055
Twin MountainWallowa-Whitman National Forest58,533
Waldo - FujiWillamette National Forest15,273
Utah (3)
AreaForestAcres
Mahogany RangeWasatch-Cache National Forest11,409
Mt. Logan SouthWasatch-Cache National Forest17,014
Mt. Logan WestWasatch-Cache National Forest5,285
Washington (1)
AreaForestAcres
Blue SlideWenatchee National Forest17,505
References (2)
  1. Flora of North America Editorial Committee (FNA). 2006c. Flora of North America north of Mexico. Vol. 21. Magnoliophyta: Asteridae, part 8: Asteraceae, part 3. Oxford Univ. Press, New York. xxii + 616 pp.
  2. 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.