Jepson eFlora
Key to families | Table of families and genera

Key to Ageratina

View taxon page for Ageratina

1. Heads generally solitary (rarely 2–3) ..... A. shastensis

1' Heads clustered

2. Leaves alternate distally on stem; heads 8–10 mm ..... A. occidentalis

2' Leaves opposite throughout; heads 6–8 mm

3. Leaf blade generally 40–100 mm; petiole generally 20–40 mm ..... A. adenophora

3' Leaf blade generally 15–55 mm; petiole generally 5–10 mm ..... A. herbacea

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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