84 IMP ATI ENS, [CH. in. 



Hildebrand has shown that of the foreign species 

 of Oxalis some are dimorphous, some trimorphous, 

 This is, however, not the case with either of our 

 English species, and I will therefore postpone any 

 remarks on this curious arrangement until we come 

 to some of the English species in which it occurs. 



Impatiens noli me tangere is proterandrous, and the 

 larger flowers cannot fertilise themselves. This species, 

 however, also produces cleistogamous flowers. (Mohl. 

 " Bot. Zeit," 1863. Bennett, " Linn. Jour.," vol. xiii.) 

 The seed capsules, when ripe, burst open if touched. 



