NATURAL HISTOnr OF PLANTS. 



These four latter are not entirely free, each of the lateral being 

 more or less connate with the posterior which envelops it, so 



Twjiafinix B,i!s, 



V^- ^' 



>V'' ' /- .i 



Fig. 41. Posterior side of (lower. Figj. 48. Dehiscent fruit. 



Fi;r. 42. Side view of flower. 



Impatiens Sdhan 



Fig. 44. Longit. sect, of flower. Fig. 4.3. Diagram. Fig. 47. Fruit. 



that these four appendices may only represent two, more or less 



deeply hilobate. The androceum 

 consists of five alternipetalous hy- 

 pogynous stamens, each formed of 

 a short wide flat free filament, and 

 a two-celled iutrorse anther adher- 

 ing to the neig'hboiiring anthers 

 even at the time when the pollen 

 is emitted, 1 which takes place by 

 two short clefts of variable extent. 

 The inner surface of the filaments 

 is often prolonged into a kind of ac- 

 cessory collarette applied to the 

 ovary. The ovary is free, superior, 



formed of five oppositipctalous cells, surmovmted by a style with stig- 



Fig. 45. Androceum 

 and Gjnœceum 



Fig. 4(5. Longit. sect, 

 of AuHroceum and 

 Gynjeceum. 



1 " Cylindrical, slightly compressed on two versely oval, as much to the upper as the lower 

 sides, rounded at the extremity ; umbilicus trans- part of each of the small sides (thus four in all) . 



