Senecio inaequidens DC. (Compositae, Senecioneae), a noxious weed introduced to Mexico

Senecio inaequidens DC., a weed of South African origin, is reported from 10 localities of central Mexico. In most places the populations are small and apparently of recent arrival. However, in the vicinity of the town of Amealco, situated in the southern extreme of the state of Querétaro, the speci...

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