=Chess Cheat.= _Bromus secalinus_ L. Florets swollen a little above the middle, the floral glume rounded on the back, obscurely 7-nerved, 6-7 mm. long, an awn 3-4 mm. long, more or less; palea covering the concave side, each edge bearing a single row of stiff hairs; glume and palea closely adhering to the grain. Introduced from Europe. A weed in wheat fields. [Illustration: Fig. 8.] =Barren Brome Grass.= _Bromus sterilis_ L. Floral glume minutely roughened, adhering to the grain; 5-7 nerved; 11-15 mm. long; compressed; concave in section. Introduced from Europe, becoming common in the state. [Illustration: Fig. 9.] =Sand-Bur. Bur-Grass.= _Cenchrus tribuloides_ L. Spikelets consisting of the grain and its coverings, broad oval, somewhat flattened, about 7 mm. long, thinly covered by stiff, straight, barbed, prickles, 2-5 mm. long, making a disagreeable and formidable bur, often common on sandy land. Native of this country. [Illustration: Fig. 10.] =Bermuda Grass.= _Cynodon Dactylon_ L., Pers., (Capriola Dactylon (L.) Kuntze). Floral glume enclosing the grain, smooth, light colored, oval to half-oval, 1.5 to 2 mm. long, in cross section with two long sides and a short side half as long; grain light brown, obovate to oval, a small nipple at the larger end. The plant seeds in hot countries but not in cool, temperate regions; spreading chiefly by coarse, hard rootstocks. Introduced. [Illustration: Fig. 11.] =Small Crab-Grass.= _Digitaria humifusa_ Pers. _Panicum lineare_ Kroach. _Syntherisma linearis_ (Kroch.) Nash. Spikelets in the rough, before severe rubbing, ovoid or oblong, flattened, 2 mm. long, first glume minute, second and third as long as the spikelet, soft with very short hairs, one of them 3-nerved, the other 5-nerved; floret after severe rubbing, brown to black, smooth, floral glume of the rounded side curving over the edges below covering with their edges about two-thirds of the palea. Introduced from Europe; becoming troublesome on thin lawns. [Illustration: Fig. 12.] =Large Crab-Grass. Finger Grass.= _Digitaria sanguinalis_ (L.) Scop. _Panicum sanguinale L. Syntherisma_ (L.) Nash. Spikelets before severe rubbing, oblong, acute, 2.5-3.5 mm. long, first glume on flattened side minute, second on rounded side about half as long as the spikelet, pubescent or nearly smooth, third glume more or less pubescent, 5-7-nerved; floret, after severe rubbing, smooth, edges of floral glume thin. Introduced from Europe. Roots very tough and coming from the lower joints. [Illustration: Fig. 13.] =Barnyard Grass.= _Echinochloa Crus-galli_ (L.) Beauv. _Panicum Crus-galli_ L. Florets oval, white, yellowish gray or brown, 2.4-3 mm. long, plano-convex, glume on the convex side, highly polished, three obscure longitudinal nerves. Native of this country. [Illustration: Fig. 14.]