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 tbau tivice as mauy as the petals. 



f Stamens hypogynovs (inserted on the receptahle). 

 -H Pistil apocarpous (carpels separate from each other). 



RantjncolacejE. — Herbs. Leaves generally decompound 



or much dissected 2 



AuoNACE^.^Small trees. Leaves entire. Petals 6, in 2 



sets 10 



ilAGNOLiACE.3!; — Trees. Leaves truncate. Fruit resem- 

 bling a cone 9 



Menispermacej9B. — Woody twiners. Flowers dioecious. 



Leaves peltate near the edge 10 



Brasenia, in 



Nymph^ace^. — Aquatic. Leaves oval, peltate ; the peti- 

 ole attached to the centre 12 



Malvace^.— Stamens mooadelphous. Calyx persistent. 



Ovaries in a ring 38 



