580 MONOECIA TETRANDRIA. AlnUS. 



a 



ALNUS. Schreb. gen. N. 1419. 

 Ma/e calyx the scales of the anient, three-flowered. Corol 

 from three to four-parted. Female ca ///a; the scales of the 

 anient, two-flowered. CoroZ none. Styles two. Nut com- 

 pressed, two-celled. 



1. A. ylutinosa, Willd. iv. 334. 



Male peduncles branched. Leaves roundish-obovate, ser- 

 rulate, some obtuse, some pointed ; veins glutinous, and their 

 axills villous underneath. Stipules lanceolate oblong. 



Found by Colonel Hardwicke, on his tour to Shreenagur. 



See Asiat. Res. vi. p. 373. 



2. A. dioeca. R. 



Leaves oblong, polished, entire, obtuse pointed, axills of the 

 veins naked. Male aments sessile, cylindric. Stipules fal- 

 cate, lanceolate, 



Kokra the vernacular name at Silhet, where the tree is indi- 

 genous, and grows to be of considerable size ; its timber very 

 hard, and used for various economical purposes. The tree 

 flowers in March, and the seed ripens about the beginning of 

 the cool season. 



Young branchlets smooth, much divided. Leaves alter- 

 nate, short-petioled, oblong, entire, obtuse pointed, of a firm 

 texture, and very smooth ; from three to six inches long, and 

 from two to two and a half broad. Stipules falcate-lanceolate, 

 ciliate. Male aments axillary, several together, sessile, cy- 

 lindric, about an inch long. Scales reniform, ciliate, concave, 

 from three to four-flowered. Calyx four-parted. Corol 

 none. Filaments four, arising from the base of the segments 

 of the calyx, and of their length. Anthers two-lobed. Germ 

 a small sub-cylindric, villous gland in its place. Female 

 AMENTS on a separate tree; axillary and lateral below the 

 leaves, solitary, sessile, sub-globular, few-flowered. Scales 

 of the anient, and calyx as in the male. Corol none. Sta- 



