The Collaborative International Dictionary of English v.0.48:
Digitaria \Digitaria\ n. a genus of plants including the crab grass (Digitaria sanguinalis); finger grass. Syn: genus Digitaria. [WordNet 1.5]WordNet (r) 3.0 (2006):
Digitaria n 1: crab grass; finger grass [syn: Digitaria, genus Digitaria]