444 PHARMACEUTICAL BOTANY 
The Conifers include the pines, spruces, hemlocks, cedars, firs, 
redwoods, yews, arbor vitae, chamzecyparis, and larches. All of 
their number are evergreen except the European larch, which 
drops its foliage upon the advent of winter. 
i 
Fic. 332.—The White Pine (Pinus Strobus). 
Lire History oF A GyMNosPERM (Pinus Stropus) 
The White Pine frequently called the Weymouth Pine (Pinus ‘ 
Strobus), one of the principal timber trees of the Northern 
States and Canada, is also of value in pharmacy and medicine. 
The inner bark of its trunk and branches is used because of its 
valuable expectorant properties and is official in the National 
Formulary. 
