6. DIGITARIA LAXA (Rchb.) Parodi, Physis (Buenos Aires) 9: 18. 1928.

Reimaria laxa Rchb., Surinam Exsic. [in sched.]. 1828. Valota laxa (Rchb.) Hitchc. & Chase, Contr. U.S. Natl. Herb. 18 (7): 292. 1917. Trichachne laxa (Rchb.) Hitchc., Man. Grasses W. Ind. 165. 1936.

— TYPE: SURINAME. 1827, Weigelt s. n. (holotype: B; isotypes: BM!, MVFA!, W!) .

Trichachne recalva Nees, Fl. Bras. Enum. Pl. 2: 88. 1829. Panicum recalvum (Nees) Kunth, Révis. Gramin. 1: 39. 1829.

— TYPE: BRAZIL. Habitat in ripa fluminis S. Francisci ad Joazerio, alt. 1,016 ped., provinciae Bahiensis, floret Aprili, K. Martius s. n. (holotype: M) .

Iconography — Henrard (1950: 381, spikelet and upper floret); Vega and Rúgolo de Agrasar (2012: 299).

Geographical Distribution and Ecology — Caribbean, Venezuela, French Guiana, Guyana, Surinam, Brazil, Bolivia, Paraguay, and Argentina. It is frequent in river and streams shores, and within riparian groves from sea level to 800 m.