INTRODUCTION. xlv 



Cells of the anther succulent, without 

 appendages. 

 Ovarium 3-celled - - 200. PoLEMONiACEit. 



Ovarium 2- or 4 -celled. 



Filaments flaccid. Pericarp mem- ), „., „ 



l.ranous, dehiscing transversely S ^' P^'^^tagine^e. 

 Filaments rigid. Pericarp hard 

 or fleshy- 

 Leaves alternate - - 213. Solane^e. 

 licavcs opposite. 



jEstivation valvate - - 198. Spigeliace>e. 

 ^Estivation imbricate or 

 convolute. 

 Stipulse between the),,,, ■, 



^ .• 1 ; 194. LiOGANIACE^E. 



petioles - 5 



Stipulae absent - - 197- Gentiake^e. 

 Cif' Flowers irregular. 



Ovarium deeply lobed ... - 221. Labiat^e. 



Ovarium entire. 



Fruit indehiscent, or not opening by valves. 



Fruit 1-celled - - . . 188. GlobularinEjE. 



Fruit 2- or 4-celled ; che cells all normal. 



Radicle inferior . - - . 220. Verbenace,^;. 



Radicle superior. 

 Ovules erect . , . . 219. Selagine^e. 



Ovules pendulous . . - 218. Myoporine^. 



Fruit with several cells, all of which beyond 2 are),,- „ ,,. ^ 



spurious - - - •- .;215. Pedaline^(6*4 



Fruit dehiscent. 



Ovarium 1-celled, with a central placenta . - 208. Lentibulari.e. 



Ovarium 2-celled, or 1-celled, with two opposite pa- 

 rietal placentae. 

 Albumen none. 



Seeds attached to rigid hooked processes - 214. AcanthacEjE. 



Seeds adhering immediately to the placentse. 



Seeds winged . ■ - . 217. BignoniacEjE. 



Seeds apterous. 



Fruit siliquose, 1-celled, or spuriously ) „,,> ^ 



2-celled - - - _ J^ 216. Cyrtandrace^. 



Fruit woody, short, spuriously 4- or 6- ) -, , „ 



celled - - . . J-ila- PEDALINE.E. 



Albumen present. 



Radicle pointing to the hilum. 



Ovarium 2-celled ... 211. ScrophuearinEjE. 

 Ovarium with more cells than 2 - - 170. Erice^ {bis). 

 Radicle pointing to the extremity of the seed 

 which is most remote from the hilum. 



Embryo in the axis. Ovarium 2-celled 212. Rhinanthace^. 

 Embryo minute in the apex. Ovarium ) „,„ ,-. 



1-celled - - -PIO. Orobanche^:. 



Tribe II.— GYMNOSPERMI^. 

 Seeds destitute of a pericarpiuvi. 



Resinous. lieaves simple. Trunk branched - - 228. Conifer.e. 



Mucilaginous. Leaves pinnated. Trunk nnbranched - - 227. CYCADEyE. 



