Perennial Plant : A plant that lives for more than two growing seasons. For fire danger rating purposes, biennial plants are classed with perennial plants. See also: Annual; Annual Plant
National Wildfire Coordinating Group (NWCG), Glossary of Wildland Fire Terminology, NWCG Program Management Unit, National Interagency Fire Center, Boise, ID, USA 2014. http://www.nwcg.gov/pms/pubs/glossary/pms205.pdf, (For Fr - Amer) {45}