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Chromolaena A.P. de Candolle.

Key to Chromolaena

A genus of about 165 species, perennial herbs and shrubs, of s. North America, Central America, and South America.

ID notes:Similar in general appearance to other Eupatorioid perennials and suffrutescent shrubs (such as Tamaulipa azurea, Koanophyllon villosum, and Ageratina havanensis) in their often well-petioled, triangular leaves, and pink, blue, to purple discoid heads. Chromolaena differs especially in its deciduous phyllaries, that are broader and and the inner petaloid.

Ref: Cronquist (1980); Nesom (2006ll) In Flora of North America Editorial Committee (2006c). Show full citations.

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