16 PUBLIC HEALTH BULLETIN NO. 286 



4. Leaves opposite 5. 



4. Leaves alternate or borne irregularly 13. 



5. Leaves simple 6. 



5. Leaves compound 11. 



6. Leaves lobed (fig. 4) Acer, p. 122. 



6. Leaves not lobed 7, 



7. Shrubs, often very low; leaves with tiny semi trans- Hypericum, p. 12i/. 



parent dots visible with hand-lens; flowers showy 



yellow (fig. 5). 



7. Shrubs or small trees; leaves without dots; flowers not 8. 



showy yellow. 



FiGUBE 4. 



Figure 5. 



8. Stems sturdy and erect, leaves elliptic to wider; 9. 



flowers not showy purplish. 

 8. Stems weakly arching; leaves lanceolate; flowers Decodon, p. 125. 

 showy purplish (fig. 6) . 

 9. Leaves remotely toothed, acuminate at apex; flowers Forestiera, p. 133. 



appearing before the leaves (fig. 7). 

 9. Leaves entire, acute but not acuminate; flowers appear- 10. 

 ing after leaves are on the plant. 



Figure 6. 



Figure 7. 



