ru·der·al 
(rdər-əl)
(rdər-əl)adj.
Colonizing or thriving in areas that have been disturbed, as by fire or cultivation.
n.
A species, especially a plant, that colonizes or thrives in disturbed areas.
[New Latin rūderālis, from Latin rūdus, rūder-, rubble, broken stones; possibly akin to German Grieß, grit, semolina, Lithuanian grūdas, grain, and Russian gruda, pile.]