Ageratina adenophora
(Spreng.) R. M. King & H. Rob.
Sticky snakeroot, Thoroughwort
Ageratina adenophora is a perennial herb that is not native to California.
Cal-IPC rating: moderate
Bloom Period
one or more occurrenceswithin a 7.5-minute quadrangle
The blue points on the map indicate observations in Calflora.
Click on the map to view observations within a specific county.
Click on the map to view observations within a specific county.
Jepson eFlora section:
eudicot
USDA PLANTS group:
Dicot
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[Wikipedia] Origins and Introduction: Ageratina adenophora (synonym Eupatorium adenophorum), commonly known as Crofton weed, is a species of flowering plant in the family Asteraceae native to Mexico and Central America. Originally grown as an ornamental plant, it has become invasive into farmland and bushland worldwide. It is toxic to horses, who develop a respiratory disease known as Numinbah Horse Sickness after eating it. (link added by Jessica Johnston)
