Digitaria is a genus of plants in the grass family 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.
(Wikipedia)