KEY TO NATURAL OEDEES. Xlll. 



Division V. APETALjE AMENTIFEKjE. 



Flowers mostly apetalous and unisexual; the staminate usually in 

 itiuents or catkins, as are also sometimes the pistillate. 



* Herbaceous plants; small green flowers in, arnenl-like racemes- 

 Sterna square; herbage stinging-bristly TJrticace^; 296 



* * Woody plants, mostly trees or large shrubs. 



Monoecious; flowers and fruits in globose heads. . Platanaceje 297 

 Monoecious; flowers of both sexes in aments. 

 Staminate aments long, pendulous; pistil- 

 late ovoid, erect Betulaoe« 297 



Aments all short, erect; fruit a spheroidal 



nutlet Myricace.5! 298 



Monoecious; pistillate flowers not in aments. 



Fruit drupaceous; nut rugose Juglandes! 301 



Fruit nut-like, inserted in, or enclosed 

 within an involucre. 



Involucre scaly or prickly Cupulifer.*; 301 



Involucre coriaceous-leafy Corylace-s: 304 



Dioecious; flowers of both kinds in aments or 



catkins. 

 Flowers in a long pendulous opposite-bracted 



aments Garryace.2e 160 



Aments alternate-bracted; fruit capsular; 



seeds comose Salioace^; 299 



Subclass II. ENDOGENS. 



Leaves parallel veined; flowers 3-merous; cotyledon 1 only. 



Ovary inferior, twisted Orciti:dace,e 305 



Ovary inferior, not twisted Iridaoeje 307 



Ovary superior; fruit a 3-celled capsule or a 



berry Liliace^; 308 



