244 8. Betula. 5. BETULIDEiE. 
PI. ex. mon. 
opposite side, is saccharine, lithontripic, and may be fer- 
mented either into a wine or beer ; wood used for heels of 
women’s shoes, and packing-boxes. 
j3. pendula. Twigs pendulous, rough with tubercles ; 
leaves small. 
y. glohosa . Cones ovate, or nearly spherical. 
\ 
2. Betula nana . Dwarf birch . 
Leaves orbicular, crenate, smooth, beneath reticulately 
veined. 
Betula nana, Lin. S. P. 1394. 
Spongy mountainous heaths ; shrub ; May. 
Stem 3 feet high ; branches numerous, stiff ; leaves both 
sides smooth, 1 to 3 from each bud ; petioles short ; ament 
lateral, upright, blunt. 
II. 9. ALNUS. Pliny. Alder. 
Male. Ament long, cylindrical; scales pedicelled, heart-, 
shape, with 3 small scales beneath, flowerbearing at the 
base; perigonium urceolate 4-cut; stamens 4.— -Female. 
Cone ovate, globose; pedicell branched; scales imbricate, 
corky, persistent, 4-lobed at the tip, 2-fiowered ; perigo - 
nium 0 ; ovary compressed, 2-celled ; stigmata 2; nucula com- 
pressed, ovate, naked, 2-celled, 2-seeded. 
Alnus glutinosa. Glutinous alder. 
Leaves roundish, cuneate, obtuse, rather retuse, glutinous; 
axillae of the ribs beneath villous. 
Alnus, Rail Syn. 442, 1 . 
Alnus nigra, sive Frangula, Ger. em. 1469. 
Alnus vulgaris, Park. 1408. 
Betula Alnus a, Lin. S. P. 1394. 
Betula Alnus, Huds. FI. Angl. 416. 
Alnus glutinosa, Gcerln. Sem. and Fr. 2,54. 
Black alder. Butchers’ prick tree. Owler. 
Watery places; tree; March. 
Leaves serrate, dark green, shining ; ribs pinnate, pa- 
rallel ; beneath pilose at the base ; peduncles branched, ter- 
minal ; aments pendulous ; cones upright, scales not falling 
off. — Inner bark purgative. 
Fam. VI. 6. CORYLIDEJS. Corylacece , Mirbell. 
Cupnlacece , Richard. 
Blowers unisexual. — Male amentaceous ; perigonium 
simple or 0 ; stamens 5 to 20, on the scales ; anthers 1 or 
