CORYLUS, the HAZEL; a genus of the polyanthia order, belonging to the monœcia class of plants. Mr Miller reckons three species, though other botanists make only two. They are all of the large shrub kind, hardy and deciduous; and have several varieties, valuable for their nuts, as also for their variety in large wildernesses and shrubbery works. They will prosper in almost any soil or situation, and turn out to good account when growing in coppices to cut as underwood, and as poles for various uses, as hoops, spars, hurdles, handles to husbandry implements, walking-sticks, fishing-rods, &c. for which purposes they may be cut every 5th, 7th, or 8th year, according to the purposes for which they are designed. The best method of propagating them is by layers, though they may also be raised from the nuts.