=Wild Oat.= _Avena fauta_ L. Freed from chaff the floral glume is firm, rough, brown, thinly hairy, about 15 mm. long, awn from near the middle 2-4 cm. long with several firm twists, abruptly bent near the middle, the true grain seldom separated from the firmer floral glume. A bad weed in Oregon and California, seldom seen in Michigan.
=Field Chess.= _Bromus arvensis_ (L.) Not often seen in this country; floral glume 6-7 mm. long bearing an awn rather longer; grain much like that of _B. secalinus_ which see. Introduced from Europe.
=Soft Chess.= _Bromus hordeaceus_ L. (_Bromus mollis_). Floral glume extending beyond the grain, 5-7 nerved, 6-9 mm. long, grain rounded on the back, shape of a shallow boat, 6.5 mm. long, palea thin with comb-like teeth on the margins. Waste places, thin meadows. Introduced from Europe.
=Smooth Brome-grass.= _Bromus racemosus_ L. Florets about 9 mm. long, awn 6-10 mm. long; longer, softer, thinner, with longer awn than found in florets of _B. secalinus_ which see. Not often seen in this country. Introduced from Europe.
=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.
=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.
=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.
=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.