KEY TO THE FAMILIES OR ORDERS 



INCLUDED IN THIS WORK. 



SERIES I. PHANEROGAMS. 

 Plants producing true flowers and seeds. 



CLASS I. DICOTYLEDONS. 



Distinguished ordinarily by having net-veined leaves, and the 

 parts of the flowers in fours or fives, very rarely in sixes. Wood 

 growing in rings, and surrounded by a true bark. Cotyledons of 

 the embryo mostly two. 



SUB-CLASS I. ANGIOSPERMS. 

 Seeds enclosed in an ovary. 



I. POLYPETALOUS DIVISION. 



Two distinct sets of Floral Envelopes. Parts of the corolla 

 separate from each other. 



A. Stamens more than twice as many as the petals. 



* Stamens hypogynous (inserted on the receptacle). 

 +- Pistil apocarpous (carpels separate from each of her). 



RANUNCULACE^E. Herbs. Leaves generally decompound 



or much dissected 2 



AXONACE^E. Small trees. Leaves entire. Petals 6, in 2 



sets 7 



MAGNOLIACE^ Trees. Leaves truncate. Fruit resem- 

 bling a cone 6 



MENISPERMACE^E. Woody twiners. Flowers dioecious. 



Leaves peltate near the edge 7 



Brasenia, in 



ME. Aquatic. Leaves oval, peltate ; the peti- 

 ole attached to the centre 9 



