KEY 



2. divisions cut; flowers irregular, purple. 



Violacece (Viola)* 



OPPOSITE. 



1. leaves sensitive; flowers yellow. Oxalidacece. 



ALTERNATE. 



1. three-five divided; flowers white or yellow, five 



petals, numerous stamens. Rosacece. 



2. flowers in loose sprays or dense heads, more or 



less butterfly shaped, yellow, white, pink, vio- 

 let, purple, or magenta; fruit a pod. Leguminosce. 



Leaves pinnately-divided. 



OPPOSITE. 



1. flowers pink or purple. Geraniacece (Er odium). 

 ALTERNATE. 



1. leaves sweet-scented; petalless flowers in spikes. 



Myricacece. 



2. plant when cut exuding orange-coloured juice. 



Papaveracece. 



3. leaves sensitive; flowers large, yellow. 



Leguminosce (Cassia). 



4. flowers in loose groups or in heads, more or less 



butterfly-shaped, yellow, bluish, or purple, 

 white or pink; fruit a pod. Leguminosce. 



5. divisions themselves very finely dissected; flowers 



in flat-topped clusters, white. Umbelliferce. 



Leaves u pitcher-shaped." Sarraceniacece. 



Leaves red, sticky. 



1. flowers white or pink. Droseracece. 



Leaves like tiny scales. 



1 . at the joints of the stems. Chenopodiacece (Salicornia) . 



2. leaves early deciduous; stems extremely fleshy, 



bristly. Cadacece. 



xviii 



