SEED-BEARING PLANTS 
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406. Willow Family (Salicaceae). This family com- 
prises both the willows (Salix) and the poplars (Populus). 
There are about 20 species of poplar in North America. 
The willows, in North America, comprise over 30 species, 
FIG. 340. Inflorescence of a willow (Salix discolor). At the left pistillate, 
at the right staminate catkins. 
trees and shrubs, and are specially common in moist 
situations. Several species are cultivated to furnish 
twigs for basket-making. The weeping willow (Salix 
babylonica), an object of peculiar beauty along streams 
and lakeshores, owes its pendulous or "weeping" character 
