THE DICOTYLEDONES 



1759 



Fig. 1639. — Querciis petraea. Sessile or Durmast Oak. 

 Habit of growth, showing short horizontal branches and 

 the prolonged trunk which are characteristic of this 

 species. Early spring. 



Fig. 1640. — Querciis robiir (pediinciiliita). 

 Male catkins. 



