23 



comigata E. & S. Mant. 2: 276 (1824) . Chamxraplm corrugaia Kuntze Rev. Gen. 

 PL 2: 770 (1891). (Fig. 11.) 

 A rather stout, erect or ascending ceespitose annual, 6 to 10 dm. high, with elongated, 

 .spike-like panicles and linear-lanceolate, scabrous leaves. Culms compressed, 

 striate, scabrous below the nodes and panicle, otherwise smooth, much branched 

 at the base, often geniculate and rooting at the lower nodes; nodes brown, 

 bearded with short appressed hairs; sheaths very loose, compressed, keeled, the 

 lower ones usually much exceeding the internodes, scabrous or sometimes nearly 

 smooth, rarely pubescent, smooth or ciliate on the margin; ligule fringed with 

 rather rigid white hairs; 

 leaf-blades 1 to 3 dm. long, 

 3 to 6 mm. wide, scabrous on 

 both sides, serrulate-sca- 

 brous on the cartilaginous 

 margins, tapermg to the 

 base, acuminate-pointed. 

 Panicles cylindrical, dense, 

 narrowed to the obtuse 

 apex, 6 to 16 cm. long, 6 to 

 15 mm. in diameter below, 

 exclusive of the setae; rachis 

 angular, pilose; branches 

 short, contiguous, densely 

 5 to 15 flowered; setee 1 

 or rarely 2 at each spikelet, 

 green or purplish, erect- 

 spreading, flexuous, 5 to 

 15 mm. long, antrorsely 

 scabrous. Sitikelets ovate, 

 acute, about 2 mm. long, 

 gibbous; first glume one- 

 third to one-half as long as 

 the spikelet, ovate-cordate, 

 acute, 3 to 5 nerved, mclos- 

 ing the base of the spike- 

 let; second glume broadly 

 ovate, acute or obtuse, 

 apiculate, about four-fifths 

 as long as the spikelet, 5 to 

 7 nerved, the mid-nerve 

 excurrent, the lateral ones 

 anastomosing or abruptly 

 vanishing in the hyaline 

 margin; third glume equal- 

 ing and slightly inclosing the 

 fiowering glume, sulcate, 5-nerved, subtending a lanceolate, hyalme jmlea, nerves 

 in all the glumes green, prominent; flowering glume ovate, acute, convex, very 

 strongly transversely midulate- rugose for its whole length; the inclosed palea 

 transversely striate, slightly convex at the base, plane above. 



In waste places, cultivated fields, etc., Georgia to Florida. July-October. 



Specimens examined. — Florida: Jacksonville, 3616 Curtiss; no locality. Chapman, 

 Duval Co., 328 Fredholm 1893; Apalachicola, 108 Kearney 1895; Anastasia Island, 

 175 Kearney 1895; Grasmere, 1047 Combs & Rolfs 1898; Cedar Key, 795 Combs 

 1898; Orange, Baker 1897; Homosassa, 944 Combs 1898. 



FiG.ll.—Ghcefochloacornigata: a, spikelet .showing seta; h,c, 

 views of the spikelet; rf, tiowering glume, dorsal view. 



