244. 8. Betula. 5. BETULIDEiE. PL 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. pendiila. Twigs pendulous, rough with tubercles ; 

 leaves small. 



y, glohosa. Cones ovate, or nearly spherical. 



2. Betula nana. Dwarf hirdi. 



Leaves orbicular, crenate, smooth, beneath reticulately 

 Teined. 



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 ; anient 

 lateral, upright, blunt. 



II. 9. ALNUS. Pliny. Mder. 



Male. Anient 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-flowered; perigo- 

 nium ; ovary compressed, 2-celled ; stigmata '2.-, nucida com- 

 pressed, ovate, naked, 2-celled, 2-seeded. 



Alnus glutinosa. Glutinous alder. 



Leaves roundish, cuneate, obtuse, rather retuse, glutinous: 

 axillce of the ribs beneath villous. 



Alnus, Rail Syn. 442, 1. 



Alnus nigra, sive Fraugiila, Ger. em. 1469. 



Alnus vulgaris, Park. 1408. 



Betula Alnus a, Lin. S. P. 1394. 



Betula Alnus, Huds. FL Angl. 416, 



Alnus glutinosa, Gcertn. 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. CORYLIDE^. Corylacea, Mirbell. 



Cupulacece, Richard. 

 Flowers unisexual. — Made amentaceous ; perigonium. 

 simple or ; stamens 5 to 20, on the scales ; anthers I or 

 1 



