On bottom-lands, where moisture is abundant, this grass develops much more luxuriantly, growing in a close mass, and often to a height of a foot or more, if not grazed down, when it is cut for hay, and sometimes yields 11/2 tons to the acre. In Montana and the north it is generally known as "buffalo-grass," a name to which it would seem to be fully entitled, notwithstanding the fact that this name is also applied, and quite generally, to another species, the next to be noticed. _Buchloë dactyloides_ (Southern buffalo-grass).--This species is next in value and extent of distribution to the grama grass. It also is found all over the great plains south of Nebraska and southern Wyoming, but not further north, although in many localities it occurs so sparsely as to be of little account. A single bunch of it very greatly resembles _Bouteloua oligostachya_, but its general growth is very different. It is very short, its general mass seldom rising more than 3 inches above the ground. It grows in extensive patches, and spreads by means of stolons, which sometimes are 2 feet in length, with joints every 3 or 4 inches. Owing to its southern distribution this might well be named the Southern buffalo grass, to distinguish it from the two other species of higher latitudes, to which the name "buffalo" has been fastened forever. _Stipa spartea_ (Northern buffalo-grass; wild oat).--This grass is found in southern Manitoba, westwardly across the plains to the Rocky Mountains, and southward as far as Montana, where it is common in many localities. On what was once the buffalo range of the British Possessions this rank grass formed the bulk of the winter pasturage, and in that region is quite as famous as our grama grass. An allied species (_Stipa viridula_, bunch-grass) is "widely diffused over our Rocky Mountain region, extending to California and British America, and furnishing a considerable part of the wild forage of the region" _Stipa spartea_ bears an ill name among stockmen on account of the fact that at the base of each seed is a very hard and sharp-pointed callus, which under certain circumstances (so it is said) lodges in the cheeks of domestic animals that feed upon this grass when it is dry, and which cause much trouble. But the buffalo, like the wild horse and half-wild range cattle, evidently escaped this annoyance. This grass is one of the common species over a wide area of the northern plains, and is always found on soil which is comparatively dry. In Dakota, Minnesota, and northwest Iowa it forms a considerable portion of the upland prairie hay. Of the remaining grasses it is practically impossible to single out any one as being specially entitled to fourth place in this list. There are several species which flourish in different localities, and in many respects appear to be of about equal importance as food for stock. Of these the following are the most noteworthy: