Coleataenia rigidula (Bosc ex Nees) Le Blond

Panicum condensum Nash, in Small, Fl. SE. U. S. 93. 1903
Plants like P. agrostoides in habit; culms on the average rather taller, sometimes geniculate at base; leaf-sheaths appressed-pubescent along the sides toward the summit or glabrous; blades often sparsely pilose on the upper surface at the conduplicate base; panicles terminal and axillary, 10-25 cm. long, rarely more than 5 cm. wide, the long, solitary or fascicled branches erect, naked at the base, with appressed branchlets bearing crowded spikelets on short, scabrous, but not pilose pedicels, or these occasionally with one or two erect hairs ; spikelets 2.2-2.5 mm. long, about 0.8 mm. wide, turgid; first glume slightly more than half the length of the spikelet, acuminate; second glume slightly longer than the sterile lemma, both acuminate, the tips slightly spreading, scabrous on the midnerves toward the apex; fruit 1.4-1.5 mm. long, about 0.7 mm. wide.
Type locality: Florida.
Distribution: New Jersey to Florida and Texas; West Indies.