The leaves are less symmetrical than those of Beech, and are broader towards the base. They are of rougher texture, hairy on the underside, and their edges are doubly toothed. In autumn they turn yellow, then to ruddy gold, but a few days later they have settled into the rusty hue they retain throughout the winter, in those cases where they remain on the tree until spring. The wood is exceedingly tough, and not to be worked up with ease, but it is considered to make admirable fuel. Evelyn says, "It burns like a candle." There are those who say that the name Hornbeam has reference to the tough or hornlike character of its beams; others declare that in the days when bullocks were yoked to the plough the yoke was made of this wood, as being fitted by its toughness to stand the strain, and as it was attached to the horns, it became the horn-beam. A third theory is that the name was derived from _Ornus_, the Manna-ash, with which early botanists confused it, but with all respect to the authority of Dr. Prior, who favours it, we prefer to stand on the first suggestion, with old John Gerarde, who says ("Herball," 1633): "In time it waxeth so hard that the toughnesse and hardnesse of it may be rather compared to horn than unto wood, and therefore it was called Hornbeam or hardbeam." The carpenter is not pleased who has hornbeam to work up, for his tools lose their edge far too quickly for his labour to be profitable. Evelyn tells us that it was called by some the Horse-beech, from the resemblance of the leaves. [Illustration: _Pl. 21._ Hornbeam--summer.] [Illustration: Hornbeam.] The two kinds of catkins are similar and cylindrical, but whilst the male is pendulous from the beginning, the female is erect until after the formation of the fruit, when it gradually assumes the hanging position. The bracts of the male are oval, with sharp tips, each containing an uncertain (3-12) number of stamens. In the female the bracts fall early, but their place is taken by three-lobed bracteoles, which enlarge after flowering, and become an inch or an inch and a half long. A single flower occupies each bracteole, consisting of a two-celled ovary and two styles. Only one cell develops, so that the hard green fruit contains but one seed. The appearance of these fruits in autumn as they hang in a spray from the underside of the branches is quite distinct from those of any other of our native trees.