ELEMENTS OF STRUCTURAL UOTANY. 



41 



Fis. 01. 



have oblong fleshy protubor- ^^ 

 auces beneath them, wliilst (' 

 others are destitute of these 

 attachments. Select a flower 

 of each kind, and examine first 

 the one with the protuberance 

 (Fig. 61), which latter, from 

 its appearance, you will prob- 

 ably have rightly guessed to be 

 the ovary. The situation of the 

 ovary here, indeed, is the same 

 as in the Willow-herb. The 

 calyx-tube adheres to its surface, and is prolonged to 

 some httle distance above it, expanding finally into five 

 teeth. The corolla is gamopetalous, and is adherent to 

 the calvx. Remove now the calyx and the adherent 

 corolla, and there is left in the centre of the flower a 

 short column, terminating in three stigmas, each two- 

 lobcd. 



There are' no stamens. 



53. Now examine the other blossom (Fig. G2). 



Calyx and corolla have almost 

 exactly the same appearance as 

 before. Remove tliem, and you 

 have left tliree stamens grow- 

 ing on the calyx-tube, and 

 slightly united by their anthers 

 fig. 62. (syngenesious). 



There is no pistil. 



You see now why some blossoms produce cucumbers, 

 and others do not. Most of the blossoms have no 

 pistil, and are termed staminate or sterile flowers, whilst 

 the others are y)is<i7/a/<' or fertile. Flowers in which 



