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The pollen grains are elliptical,yellow,and form a light, 

 dry powder. The pollen is not shed spontaneously. Very 

 slight pressure against the filaments suffices to separate the 

 anthers, the tissue at the junction acting as a hinge, and the 

 elasticity of the filaments bringing the anther faces together 

 again, the moment the pressure is withdrawn. If opened 

 and closed quietly by means of a blunt-pointed instrument (a 

 pencil-point, for example), no pollenis shaken out ; but if 

 rather violently, more or less will be scattered abroad. If 

 the head of a pin be passed through the space between the 

 filaments (fig. 6), caught between the sharp edges and with- 

 drawn, the jerk, due to the sudden release, is sufficiënt to 

 shake a quantity of pollen out. 



The ovary is cylindrical, green, and covered with 

 upward-directed hairs. It tapers gradually into the delicate 

 style. An annular nectary, in the form of a small red ring 

 (fig. 7, r), surrounds the ovary, close to its base. 



I 



T 



The style, tipped by a slightly enlarged stigma, is iden- 

 tical in colour with the coroUa. It passes either to right or 

 left of the anthers (figs. 1-6), and when seen from the front 

 is, in virtue of its similarity in colour with the background, 

 singularly inconspicuous. Attention is further directed from 

 it by being drawn to the boldly conspicuous anthers. 



No insects have been observed to visit the flowers under 

 observation. The plants were, however, kept continuously 

 under glass. An effort made to induce beesto alight on them 

 was unsuccessful. 



It is ver^ natural to presume that the diinorphism of the 

 flowers has reference to the visits of insects, and to the avoi- 



