482 PHARMACEUTICAL BOTANY 
(3) Leaves alternate in arrangement, with an entire margin 
and generally parallel-veined. 
Fic. 360.—Wheat plant showing the general habit of grasses. (Robbins.) _ 
(4) Flowers usually pentacyclic and trimerous (having the 2 
parts of each whorl in threes or a multiple thereof). : 
(5) Secondary growth in roots generally absent, the olyarch a 
radial bundle persisting from its formation. 
