MAY. 139 
OcTANDRIA. MONOGYNIA. 
THALAMIFLORZ. ACERACEZ. 
ACER. (Mapte.) 
Generic Character. Calyx divided into five parts. Petals 
five. Seed vessel having two long membranous wings. 
This tree, though now common in England, is scarcely 
considered indigenous. There are two species, the Great 
Maple, Acer pseudo-platanus, and Acer campestre, Common 
Maple. The former is found in hedges and plantations, the 
latter in woods and thickets. ‘The first is a large handsome 
tree, casting an impenetrable shade; its bark is rough, and 
often peels off in large flakes, which makes it picturesque. 
The leaves are five-lobed. Flowers green; the seed has two 
curious wings, which assist in spreading it when ripe. This 
tree often attais a large size, as much as sixty feet in 
height, and twelve or thirteen in girth. The largest known 
is at Bishopton, im Renfrewshire ; it is sixty feet mm height 
and twenty in girth. The wood is used by turners, and the 
Scotch make a wine from the sap. The campestre is a small 
tree with a rough bark, full of deep cracks. Leaves small, 
and divided into five. Wood sometimes beautifully veimed, 
and then much valued by turners. 
