Ageratina occidentalis (Hook.) R. M. King & H. Rob.
Western eupatorium, Western joepiweed, Western snakeroot
2019 Steve Matson 2019 Steve Matson 2019 Steve Matson 2007 Steve Matson 2022 Jane Cohn 2014 James Gonsman 2016 mark kircher 2017 David popp 2015 Art Clark 2015 Judy and Barry Breckling 2021 R.A. Chasey 2012 James Gonsman 2017 David popp 2022 Jane Cohn 2022 Jane Cohn 2022 Jane Cohn 2017 Mary Merriman 2022 Ian Archer Winick 2022 Ian Archer Winick 2019 Bob Sweatt 2019 Bob Sweatt 2019 Steve Matson 2023 R.A. Chasey
Ageratina occidentalis is a perennial herb that is native to California, and also found elsewhere in western North America.
[Wikipedia] Etymology: Ageratina is derived from Greek meaning 'un-aging', in reference to the flowers keeping their color for a long time. This name was used by Dioscorides for a number of different plants. (link added by Mary Ann Machi)
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Suggested Citation
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 07/09/2025).
