"Annuals. Culms tufted, 10-50 cm high; nodes glabrous. Leaves 5-25 x 0.4-0.6 cm, linear-lancoleate or linear, base rounded, blunt at apex, often folded; sheaths keeled, softly pilose; ligule truncate, membranous. Spikes digitate or subdigitate,2-18, each 3-8 cm long. Spikelets 4-6 mm long, ovate or oblong, 3-6-flowered. Lower glume 1.5-2.5 x 0.5-1 mm, lanceolate, keeled, chartaceous, 3-nerved. Upper glume 2-3 x 1 mm, oblong, keeled, chartaceous, 5-nerved. Lemmas 2-3 x 1.5-2 mm, ovate-oblong, chartaceous, 3-nerved, sub acute. Paleas 2-2.5 x 1 mm, oblong-elliptic, 2-keeled, 2-nerved. Stamens 3; anthers c.0.5 mm long. Ovary c. 0.5 mm long, elliptic; stigmas c. 0.5 mm long, violet. Caryopsis subglobose, deeply grooved on one side, transversely rugose."
It grows in moist as well as marshy areas, puddles, shallow ponds, fields, river and stream edges, ditches, canals etc. It is tolerant of heavy disturbance like trampling, organic pollution and can grow along sewage lines, gutters easily.
The root-systems are deep and numerous, therefore it is not easy to eradicate. This is one of the common grasses growing everywhere in Taiwan. A free hand leaf section show a series of bulliform cells on the upper epidermis
Goose Grass is common in most areas of Illinois, although it is apparently less common or absent in rural areas in the northern half of the state (see Distribution Map). This grass was accidentally introduced from Eurasia and it tends to be more common in areas with warm climates. Habitats include lawns and gardens, cracks in city sidewalks and pavement, margins of building foundations, vacant lots, construction sites, areas along railroads and roadsides, fields, and waste areas. Less often, Goose Grass is found in very degraded floodplain areas where there is scant ground vegetation. It is a typical weed of disturbed urban areas. Faunal Associations