ANALYTICAL KEY. 



SERIES I. PILENOGAMOUS 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 layer be- 

 tween 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 3 or more in a whorl. Parts of the flower mostly 

 in fours or fives. 



SUBCLASS I. ANGIOSPER1VLE. 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. 



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) MAG NOLI ACEA 

 Pistils several, separately immersed in hollows of the up- 

 per surface of a top-shaped receptacle. 21 NELUMBIACE^B. 

 Pistils more than one, wholly separate. 



Filaments scarcely any, much shorter than the anther: trees. 17 ANONACEJB. 

 Filaments longer than the anther. 



Flowers dioscious : twiners with alternate leaves. 18 MENISPERMACEJB. 

 Flowers perfect : if climbers, the leaves opposite. 



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



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

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



Ovules and seeds borne at the centre. Nigella, (30) RANUNCULACE.B 



Ovules and seeds parietal 41 (34) RESEDACE^ 



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

 Ovary 2-20-cellcd, 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 HYPERICACB^C 

 Alternate : style and stigma one, undivided. (38) AURANTIACE^ 



Leaves not punctate with transparent dots. 



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

 Calyx deciduous, of 



Four sepals : ovary one-celled. . . 40 (34) CAPPARIDACE^S 

 Five sepals, valvate in the bud ; ovary 5-celled. 69 TILIACEJE. 



