Yorba Regional Park, Anaheim, Orange County, CA. 7-25-08. © Joan Avise

Small Horseweed

Erigeron bonariensis

Exotic species, found throughout the tropics and subtropics. Probably originated in Central America or South America.

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Pacific Coast Highway near Crystal Cove, Orange County, CA. 5/24/2017. © Peter J. Bryant.

Pacific Coast Highway near Crystal Cove, Orange County, CA. 5/24/2017. © Peter J. Bryant.

Pacific Coast Highway near Crystal Cove, Orange County, CA. 5/24/2017. © Peter J. Bryant.

Pacific Coast Highway near Crystal Cove, Orange County, CA. 5/24/2017. © Peter J. Bryant.
Yorba Regional Park, Anaheim, Orange County, CA. 7-25-08. © Joan Avise