High Quality Content by WIKIPEDIA articles! Digitaria is a genus of about 300 species of grass (family Poaceae) native to tropical and warm temperate regions. Common names include crabgrass, finger-grass, and fonio. They are slender monocotyledonous annual and perennial lawn, pasture, and forage plants, some are often considered lawn pests. Digitus is the Latin word for finger, and they are distinguished by the long, finger-like inflorescences they produce.