The Department has many natural areas of parkland and intends to maintain and sustain its ecological character. The name "Dirty Dozen" was given to the twelve plants that pose problems and prevent the establishment of native flora due to their high reproductive rate and accelerated growth. Exotic plants, as well as native vegetation, may be considered a weed if it adversely affects the sustainability of a natural area and/or encroaches into developed landscapes.

These booklets were created to assist Department of Recreation and Parks staff and volunteers in the proper identification of problematic weeds specific to the following locations.

Bandini Canyon PDF 1536KB
Elysian Park PDF 1460KB
Ernest Debs Park PDF 1440KB
Griffith Park PDF 1358KB
Hansen Dam PDF 1668KB
O'Melveny Park PDF 1700KB
Peck Canyon Park PDF 1409KB
Zelzah Park PDF 1435KB
 
NOTE: The majority of the above documents are in PDF format and must be viewed with Adobe Acrobat Reader. To Download Acrobat Reader, CLICK HERE