Brome-Grass, or Bromus, L. a genus of plants comprehending forty-six species, of which, according to Dr. "Withering, only nine vine, but, according to Dr. Smith, twelve, are indigenous : the following three are the principal:

1. The Sccalivuts, or Smooth Rye Bromc-grass; the Polymoiphus of Withering ; which is not rare in Norfo|k| and grows near Edwin's Tord.Caermarthen shire, among the winter-corn; with panicle expanding, husks naked, seeds distinct, awns shorter than the blossom, not quite straight; it flowers in July. Cattle are fond of this grass, the seeds of v. Inch are prevalent among rye, in a considerable proportion, and when ground with the latter tor bread, not only render it"black-ish, but produce a narcotic or stu-pifying effect..—From its flower-bundles, as Bechstein informs us, a beautiful green dye may be easily extracted.

2. The mollis, or Soft Brome-grass, Lob-grass or Oat-grass, is mostly found growing in corn-fields, though sometimes in meadows, pastures, hedge-banks, and even on walls : panicle rather upright ; leaves very soft and woolly ; awn about the length of the blossom ; flowers in May and June.— Bechstein affirms that this plant affords a very agreeable fodder to all kinds of cattle, and that it deserves to be cultivated on sandy lands, as being well adapted to consolidate the soil. But its merits and demerits, in an agricultural view, are not sufficiently ascertained. Mr. Swayne says, that it is a troublesome weed in cornfields, and therefore disliked by farmers; while it is of litde. value in pastures and mowing grounds, where it generally sheds its seed before the time of mowing, and produces very few root-leaves.

3. The pbinatus fFcstuca pin-iiata, L.) or Spiked Heath Bromegrass, is found growing on heath-, and fields of a calcareous soil, par ticularly in Yorkshire, Oxfordshire, and Kent : its straw undivided ; spikets alternate, nearly sitting; cylindrical, somewhat awned: it flowers in July. - This grass is much relished by cattle of every description, but especially by sheep and goats.

It deserves to be remarked, with respect to the different species of brome-grass, that, though they may be allowed to grow in meadows and pasture-grounds, their seeds should not be suffered to mingle with corn. To extirpate this noxious weed from rye and wheat grounds, the farmer will find it his interest to employ (as is frequently done on the Continent) young people, or even children, in early weeding. Such an expedient should be particularly adopted, when the crop of a promising field of wheat is intended for seed-corn ; as, by this precaution, not only the land may be cleared of the pernicious roots, but the farther propagation of this weed will be effectually prevented. Lastly, the seeds of brome-grass. when mixed with corn, render it much lighter, and consequently of less value to those who purchase and sell grain by weight.