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Instead, they are focused on combating the spread of a select group dubbed “the evil 25,” including fountain grass, tree of heaven and Spanish broom.

The Woolsey fire tore through Malibu’s scenic hillsides and into the surrounding Santa Monica Mountains last week, charring beloved landmarks such as the Backbone Trail and leaving smoldering ash where Spanish broom once bloomed.

In Umbria they are most often found beneath oaks, and not far from Spanish broom.

Fire crews in the Angeles National Forest have been told to be wary of Spanish broom, a non-native shrub with bright yellow flowers that is considered an invasive species.

The country is chiefly an extensive olive forest, varied by a few vineyards, and enlivened by hedges of pomegranate, and Spanish broom.