Calflora: Ageratina occidentalis

Ageratina occidentalis (Hook.) R. King & H. Robinson

Western Eupatorium, western joepiweed, western snakeroot

Ageratina occidentalis, a dicot, is a perennial herb that is native to California and is also found outside of California, but is confined to western North America.

Note: TJM2 bloom period: Jun--Oct

Communities:	Yellow Pine Forest, Red Fir Forest, Lodgepole Forest, Redwood Forest, Douglas-Fir Forest
Elevation:	between 6500 and 11000 feet
Family:	ASTERACEAE
Related:	See a list of other species in the genus Ageratina found in California.

Name Status:

Accepted by TJM2 + PLANTS + JM93

Other Names:
(according to)

PLANTS:

Eupatorium occidentale

Plant
Characteristics
+ Associated
Organisms

Bloom Period

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including observations with photos

Distribution by County:

See a detailed Distribution Grid of this plant in California.

A shaded county indicates that there are ocurrence records of this plant within the county.

Hover the mouse over the map to see county names. Click to view records from that county.

	There are specimen records from this county in an herbarium.
	There are documented records, vouchered or confirmed by an expert.
	There are reported records.
	There are reported records available indirectly (eg. in botanical literature).

Records by County, with approximate record counts in the form: TOTAL / CCH. Click county name to view records.

Alpine: 9 / 7 CCH Amador: 1 / 1 CCH Butte: 9 / 7 CCH Colusa: 3 / 2 CCH Del Norte: 28 / 27 CCH El Dorado: 39 / 36 CCH Fresno: 45 / 43 CCH Glenn: 2 / 2 CCH Humboldt: 37 / 36 CCH Inyo: 44 / 38 CCH Kern: 4 / 3 CCH Lake: 2 / 2 CCH Lassen: 18 / 16 CCH Los Angeles: 2 / 2 CCH Madera: 11 / 9 CCH Mendocino: 3 / 2 CCH Mono: 66 / 60 CCH Modoc: 25 / 24 CCH Mariposa: 21 / 20 CCH Nevada: 30 / 26 CCH Placer: 13 / 7 CCH Plumas: 38 / 34 CCH San Bernardino: 2 / 2 CCH Shasta: 19 / 14 CCH Sierra: 12 / 12 CCH Siskiyou: 67 / 62 CCH Tehama: 8 / 6 CCH Trinity: 52 / 49 CCH Tulare: 51 / 47 CCH Tuolumne: 15 / 13 CCH

CCH: records provided by the participants of the Consortium of California Herbaria.

Information about Ageratina occidentalis from other sources:

Photos on Picasa / Flickr / Google Images
website references on Google
USDA PLANTS Profile (AGOC2)
Nursery availability and horticultural info (what grows with this plant?) on CNPLX
2012 Jepson Manual Treament from the Jepson Herbarium,
University of California, Berkeley
Original Publication citation. on the International Plants Names Index
Search efloras.org (Flora of North America)
Search the Lady Bird Johnson Wildflower Center Native Plant Database