Eupatorium berlandieri A.Gray
Eupatorium occidentale Hook.
Eupatorium oregonum Nutt.
Kyrstenia occidentalis (Hook.) Greene
Common Name: Western Snakeroot
Ageratina occidentalis is a perennial plant producing a clump of erect to ascending, branched stems 15 - 70cm tall from a woody, rhizomatous rootstock. The stems are more or less woody, especially near their base.
The plant is harvested from the wild for local use as a medicine
Western N. America - Washington to Montana, south to California and Utah
Crevices, outcrops, rocky slopes, ridges, talus, gravelly and sandy stream bars, mixed hardwood-conifer woodlands, aspen, open and brushy vegetation; at elevations from 900 - 2,800 metres, sometimes descending to 50 metres or ascending to 3200 metres[
Succeeds in an ordinary well-drained but moisture retentive garden soil in sun or part shade[
The plant is used externally in the treatment of rheumatism and swellings[
Seed - sow spring in a cold frame, only just covering the seed. When large enough to handle, prick the seedlings out into individual pots and plant them out in the summer.
Division in spring.