Ward's weed threatens to spread across Southwest: The invader was first found in Carlsbad, near San Diego, about 2008 by a botanist working in a habitat preserve along Alicante Road in the La Costa area.
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2016 Jason Giessow:!2017 Jason Giessow:!2018 Jason Giessow:!2019 Jason Giessow:!2020 Chris McDonald:!2018 Unknown (Calflora) with Joe DiTomaso:!
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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,
including the
Consortium of California Herbaria.[web application]. 2022. Berkeley, California:The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 05/28/2022).