DKECIA. 211 



III. TETRANDRIA. 



280. MVRICA. BARREN FLOWERS in a catkin ; calyx a concave 



scale; corolla none. FERTILE FLOWERS in a catkin; 

 calyx a concave scale ; corolla none ; styles 2 ; berry supe- 

 rior, with 1 globular seed. 



IV. OCTANDRIA. 



RHODIOLA. BARREN FLOWER calyx in 4 deep segments ; 

 petals 4; nectaries 4, notched. FERTILE FLOWER calyx, 

 petals and nectaries the same ; pistils 4 ; capsules 4, with 

 many seeds. 



281. POPULUS. BARREN FLOWER catkin imbricated; calyx a 



torn scale; corolla turbinate, oblique, undivided. FER- 

 TILE FLOWER catkin, calyx and corolla the same; stigmas 

 4 or 8; capsule superior, of 1 cell and 2 valves; seeds 

 tufted. 



V. ENNEANDRIA. 



283. MERCURIALIS. BARREN FLOWER calyx in 3 deep seg- 



ments; corolla none; stamens 9-12; anther of 2 globose 

 cells. FERTILE FLOWER calyx the same ; corolla none ; 

 styles 2 ; capsule of 2 lobes and 2 cells ; seeds solitary. 



VI. MONADELPHIA. 



284. JUNIPERUS. BARREN FLOWER calyx scales of a. catkin; 



corolla none ; stamens 3. FERTILE FLOWER -ca/## scales 

 of a catkin, fewer, finally pulpy, united into a berry with 

 3 seeds. 



285. TAXUS. BARREN FLOWER calyx none; corona none; an- 



thers peltate, lobed. FERTILE FLOWER calyx cup-shaped, 

 entire; corolla none; style 1 ; seed 1, enclosed in the en- 

 larged pulpy unconnected calyx. 



