CLASSIFICATION OF ANGIOSPERMS. 637 



value, as the presence or absence of secondary ribs, number and 

 position of the vittx, etc. 



FIG. 344. Wild Sarsaparilla (Aralia nudicaulis). The plant produces a long, cylin- 

 drical rhizome at or near the surface of the ground, and sends out at various points a single, 

 long-stalked compound leaf, and a shorter, naked scape bearing 2 to 7 umbels of greenish- 

 white flowers. The rhizome is sold as American Sarsaparilla, but it has none of the con- 

 stituents of the true Sarsaparilla. After Brown. 



Coriandrum sativum is an annual herb the fruits of which are 

 official. The compound leaves are bi- or tri-pinnate, the leaflets 



