XV1U ANALYTICAL KEY. 



Series! ITLENOGAMOUS on FLOWERING PLANTS, those 

 producing real flowers and seeds. 



Class I. DICOTYLEDONOUS on EXOGENOUS PLANTS. 



Stems formed of bark, wood, and pith ; the wood forming a layer be- 

 tween the other two, and increasing, when the stein 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 3 or more in a whorl. Parts of the flower mostly 

 in fours or fives. 



Subclass I. ANGIOSPERALE. PistU 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. 



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



# Stamens unconnected either with the calyx or corolla, hypogynous. 



Pistils numerous but cohering over each other in a solid 



mass on an elongated receptacle. Page 15 (31) Magnoliace^e. 



Pistils several, separately immersed in hollows of the up- 

 per surface of a top-shaped receptacle. 21 NelumbiacejE. 

 Pistils more than one, wholly separate. 



Filaments scarcely any, much shorter than the anther: trees. 17 Anonace^e. 

 Filaments longer than the anther. 



Flowers dioecious : twiners with alternate leaves. 18 Menispermace2E. 

 Flowers perfect : if climbers, the leaves opposite. 



Leaves not peltate : petals deciduous. . 2 (30) Kanuncclace^e. 



Leaves peltate : petals persistent : aquatics. . . 22 Cabombace2E. 

 Pistils 3 to 6 with their ovaries partly united, or one 3-G-lobed. 



Ovules and seeds borne at the centre. Nigella, (30) TyAnuncttlace.e. 



Ovules and seeds parietal 41 (34) Resedace;e. 



Pistils strictly one as to the ovary : the styles or stigmas may be several. 

 Ovary 2-20-celled, or else one-celled with 2 or more parietal placentae. 

 Leaves punctate under a lens with transparent dots, and 



Opposite : styles or its lobes or the stigmas 2-5. 48 Hypericace^:. 



Alternate : style and stigma one, undivided. (38) Acrantiace.e. 



Leaves not punctate with transparent dots. 



Calyx caducous, of 2 or 3 sepals, or a narrow cap. 24 (32) Pap averages. 

 Calyx deciduous, of 

 Four sepals : ovary one-celled. . . 40 (34) Capparidace.e. 

 Five sepals, valvate in the bud ; ovary 5-cclled. . 69 Tiliace.e. 



