INVASIVE PLANTS

The most significant threat to the plant and animal diversity and ecosystem function of San Bruno Mountain’s unique habitats is the invasion and expansion of invasive non-native plant species. Key to controlling the invasion of these introduced species will be to identify and eliminate new populations of aggressive invasive plants before they take hold of an intact native area and expand to unmanageable numbers.

Invasive species that are the primary focus:
fennel
French, Scotch, and striated brooms
various non-native thistles
poison hemlock
Himalayan blackberry
English and Cape ivy
cotoneaster
pincushion flower
velvet grass
Ehrharta grass