According to Ohio State University's Department of Horticulture and Crop Science, an endophytic fungus, or a "plant which grows within another plant," commonly infects the fescue plant. This fungus causes the fescue to create an alkaloid toxin that can poison rabbits.
About this Author
Jessica Alzarana has a Bachelor of Music in music composition from the University of North Texas, and is currently pursuing a graduate degree in music therapy from Texas Woman's University. Alzarana's essays have been published by UNICEF State of the World Children's Report, BootsNAll, Alarana Atelier, eHow, and Travels.