Nat. Ord. (Natural Order) Juglandaceï¿½. Lin. Syst. (Linnean System) Monï¿½cia, Polyandria. The three trees which properly come under this head, and belong to the genus Juglans, are the Black walnut, the European walnut, and the Butternut. The Black walnut is one of the largest trees of our native forests. In good soils it often attains a stature of 60 or 70 feet, and a diameter of three or four feet in the trunk, with a corresponding amplitude of branches. The leaves, about a foot or eighteen inches in length, are composed of six or eight pairs of opposite leaflets, terminated by an odd one. They contain a very strong aromatic odor, which is emitted plentifully when they are bruised. The large nut, always borne on the extremity of the young shoots, is round, and covered with a thick husk; which, instead of separating into pieces, and falling off like those of the hickory, rots away and decays gradually. The kernel of the Black walnut, too well known to need any description here, is highly esteemed, and is even considered by some persons to possess a finer flavor than any other walnut.