150 Rosaceae 



throughout the region, at the lower altitudes ; 

 flowering in June. 



ROSACES 

 Rose Family. 



Herbs, shrubs, or trees with alternate 

 leaves and perfect flowers; calyx free or ad- 

 nate to the ovary, 5-g-lobed; petals equal 

 in number to the calyx lobes, distinct or 

 none; stamens usually numerous and dis- 

 tinct; fruit mostly follicles or achenes. 



Carpels few; in fruit becoming 2 -several sided. 

 Stamens united at the base; flowers racemose. 



Lutkea. 

 Stamens not united at the base; flowers in panicles 



or corymbs. 

 Shrubs with simple leaves, flowers perfect. 



Spiraea. 

 Herbs with compound leaves; flowers dioecious. 



Aruncus. 

 Carpels, few or many; in fruit becoming achenes or 



drupelets. 



Fruit consisting of drupelets, usually united. Rubus. 

 Fruit consisting of achenes. 



Achenes enclosed in a fleshy fruit; prickly shrubs. 



Rosa. 



Achenes on a plane or concave receptacle; herbs. 

 Styles deciduous, naked. 



