40 



KEY TO FAMILIES AND ABNORMAL GENERA. xxiH 



Monopetals with superior ovary. 



Stamens united round and to the stigma: carpels and 

 styles inside two, distinct ; fruit of two follicles : leaves 



opposite . « ..../. 281. ASCLEPIADACE^. 



Stamens distinct 41 



r Stamens five equal in number to the corolla lobes . . 43 



41 \ Stamens eight or ten double the corolla lobes. ... 42 

 [ Stamens four or two usually fewer than the corolla lobes. 46 

 [ Stamens eight : succulent herbs with thick leaves, and 

 J yellow, four petalled flowers . . /. i44- kalanchoe. 



^'^ I Stamens ten : anthers opening by terminal pores leaves 



[ hard P- 259. ericace^. 



r Stamens on the corolla, opposite its lobes : ovary one- 



43^ celled . 44 



[ Stamens between the corolla lobes 46 



r Herbs : flowers yellow or pink : seeds many on central 



44 -I placentum p. 262. primulace^. 



[ Trees or shrubs : seed one only 45 



[ Sepals J^ inch, brown tomentose on the outside : petals 

 white : fruit % inch yellow . . / 269. sideroxylon. 

 Flowers small, pink : leaves gland-dotted : fruit small . . 



p. 266. MYRSINACE^. 



J Leaves alternate at least the lower, or radical . . . 47 



^ \A11 leaves opposite 48 



( Leaves radical : flowers in a spike terminating a leafless 

 stem : capsule opening across. . . /. 336. plantago. 

 Twining plants : corolla folded inwards and twisted in 



bud. ...,..../. 293. CONVOLVULACE^. 



Erect rough herb : flowers in a double row, on one side of 

 a curled spike. ...... /. 292. boraginace^. 



Upper leaves often in unequal pairs : ovary not divided to 

 the top : seeds flat /• 295. solanace^.. 



Submerged or marsh plant : flowers small unisexual . . . 



/. 147. serpicula. 



[ Climber : fruit scarlet /. 287. loganiace/e. 



48 \ Erect herbs : leaves three to seven-nerved : capsule incom- 

 [ pletely two-celled /. 288. gentianace^. 



f Leaves opposite 50 



^9 \ Leaves radical : or upper at least alternate. 



f Corolla regular, twisted or valvate in bud, stamens two : 

 50^ fruit fleshy /. 274. oleace^. 



L Corolla-lobes imbricate in bud 51 



47^ 



