MARCH. 71 
Monecia. TETRANDRIA. 
MoNocHLAMYDE%. BETULACE. 
ALNUS. (ALDER.) 
Generic Character. Barren flowers numerous, in a loose 
cylindrical catkin, imbricated all round. A wedge-shaped scale 
covers three flowers, which is deeply divided into four equal, 
egg-shaped, obtuse segments. Fertile flowers not so numerous, 
two under each scale. 
ALNus GLUTINOSA. Common Alder. A well-known tree, 
in flower at this time. Its wood is used Im many ways, 
principally for piles of bridges, as it does not decay by 
exposure to water. Its bark is used in dying red, and (with 
copperas) black, also for fishermen’s nets. It is a low tree, 
with rugged bark, and grows in wet meadows and moist 
grounds near water. The leaves are roundish, waved, and 
serrated, sticky, downy underneath about the veins. Flowers 
growing in long, hanging catkins, those containing the 
barren flowers longer than the others. 
Mone@cia. POLYANDRIA. 
MoNOCHLAMYDEX. CORYLACEX. 
CORYLUS. (Haszt-nut.) 
Generic Character. Barren flower. Catkins cylindrical, im- 
