ANALYTICAL KEY 



TO THE ORDERS OF ALL THE PLANTS DESCRIBED IN THIS WORK. 



Series I. PIUENOGAMOUS or FLOWERING PLANTS, those 

 producing real flowers and seeds. 



Class I. DICOTYLEDONOUS or EXOGENOUS PLANTS. 



Stems formed of bark, wood, and pith ; the wood forming a zone 

 between the other two, and increasing, when the stem continues from 

 year to year, by the annual addition of a new layer to the outside, 

 next the bark. Leaves netted-veined. Embryo with a pair of opposite 

 cotyledons, or in Subclass II. often three or more in a whorl. Parts of 

 the flower mostly in fours or fives. 



Subclass I. ANGIOSPERMJE. Pistil consisting of a closed ovary 

 which contains the ovules and the seeds. 



Division I. POLYPETALOUS : the calyx and corolla both present; 

 the latter of separate petals. 



A* Stamens numerous, at least more than 10, and more than twice the sepals. 

 1. Calyx entirely free and separate from the pistil or pistils. 



Pistils numerous but cohering over each other in a solid Page 



mass on an elongated receptacle. . . . Magnoliace.e, 48 

 Pistils numerous, separate, but concealed in a hollow receptacle. 

 Leaves opposite, entire : no stipules. . . . Calycanthace^e, 162 



Leaves alternate, with stipules Rosa, in Rosacea, 146 



Pistils several, immersed in hollows of the upper surface 



of a large top-shaped receptacle. Nelumbium, in Nymph.eaceje, 54 

 Pistils more than one, separate, not enclosed in the receptacle. 



Stamens inserted on the calyx, distinct Rosace.e, 146 



- Stamens united with the base of the petals, monadelphous. Malvace^:, 98 

 Stamens inserted on the receptacle. 

 Filaments much shorter than the anther : trees. , . Axoxace.e, 50 

 Filaments longer than the anther. 



Flowers dioecious : twiners with alternate leaves. Mexispebjiace.e, 51 

 Flowers perfect : if climbers, the leaves opposite. 

 Leaves not peltate : petals deciduous. . . Ra>txculace.e, 34 

 Leaves peltate : petals persistent. Brasenia, in Nymph^ace^;, 54 



