KEY TO THE SPECIES. Spikelets 1-flowered. Perennial. Rachilla produced beyond the flowering glumes and bearing awns with rudimentary glumes. Spikes 4 to 10, long, whorled; spikelets narrow fusiform; glume III oblong lanceolate. 1. C. incompleta. Rachilla produced beyond the flowering glume and bearing 1 to 3 reduced glumes. Spikes free at the base, digitate. Spikes 6 to 9; spikelets 2-awned; glume III ovate, bearded with long hairs above the middle. 3. C. virgata. Spikes 4 to 20; spikelets 3-awned; glume III broadly ovate, densely bearded dorsally and on the margins above the middle. 4. C. barbata. Spikes connate at the base, erect and not spreading. Spikes 2 to 6; spikelets narrow 4-awned, glume III ovate-lanceolate, bearded only on the margins and not at the back. 6. C. montana. Annual. Spike solitary, spikelets broadly cuneiform, 3-awned, glume III broadly cuneate, upper margins naked and keel villous. 2. C. tenella. Spikelets 1- to 3-flowered. Perennial. Spikes 5-9, spikelets broadly cuneate 3 to 5-awned, glume III bearded all through the margin and dorsally. 5. C. Bournei. =Chloris incompleta, _Roth._= This is a perennial grass. Stems are procumbent when growing in open places, but erect if growing amidst bushes, often branched, ending in long naked peduncles, varying in length from 1-1/2 to 4 feet. In some cases prostrate stems produce roots at the nodes. The _leaf-sheaths_ are long, glabrous, the mouth being generally hairy. The _ligule_ consists of long hairs. _Nodes_ are glabrous. The _leaf-blades_ are linear, flat, finely acuminate and narrowed into very long points at the apex; glabrous or slightly hairy at the base and contracted, 4 to 10 inches long and 1/6 to 1/4 inch broad. The _inflorescence_ consists of two to five rarely six, very slender spikes, 3 to 8 inches long, forming a terminal whorl. The rachis is fine and scabrid. [Illustration: Fig. 196.--Chloris incompleta. 1. A portion of the rachis with two spikelets; 2. the third glume and its palea with the rudimentary fourth glume; 3 and 4. the first and the second glumes; 5 and 6. the third glume and its palea; 7. the ovary, anthers and lodicules.]