- crabgrass, crab grass, finger grass - grasses with creeping stems that root freely; a pest in lawns
--1 is a kind of grass
--1 is a member of Digitaria, genus Digitaria
--1 has particulars:Egyptian grass, crowfoot grass, Dactyloctenium aegypticum; smooth crabgrass, Digitaria ischaemum; large crabgrass, hairy finger grass, Digitaria sanguinalis - finger grass - any grass of the genus Chloris; occurs in short grassland especially on waste ground or poor soils
--2 is a kind of grass
--2 has particulars:Rhodes grass, Chloris gayana; windmill grass, creeping windmill grass, star grass, Chloris truncata