HORNBEAM. 



283 



V 



Plate 20. Ostrya virginiana. Hornbeam. 



i. Flowering branch, one-half natural size. 2. Scale of staminate cat- 

 kin, enlarged. 3. Stamen, enlarged. 4. Diagram of pistillate inflorescence. 

 5. Scale oi pistillate catkin, enlarged. 6. Pistillate flower enclosed in bract 

 and bractlets, enlarged. 7. Fruiting branch, one-half natural size. 8. Lon- 

 gitudinal section oi irniting involucre, showing nut, one-half natural size. 

 9. Longitudinal section oi nut, natural size. 



