- 121 — 



stigma and pollen surface of 3 stamens, as in Cardamine 

 pratensis. The conspicuousness is attained through the 

 union of several (3 a 5) flowers in one head, all standing 

 on a level and open. A proboscis 4 to 6 mm. long is needed 

 to reach the nectar. The flower belongs to the class B of 

 Muller. 



Geranium molle, L. We found the following different 

 forms in the downs in Blankenberghe. 1° The ordinary 

 form, hermaphrodite proterandrous, so as it was described 

 by H. Muller. — 2° A female form with anthers devoid 

 of pollen. The stamens though sterile curve inwards like 

 in the first form. — 3° some transition stages between the 

 first and second form : a certain (variable) number of 

 stamens are sterile. Flowers of this form are often to be 

 found on the same individuals on which are flowers 

 agreeing with the two first forms. — hi the neighbour- 

 hood of Ghent, G. Molle agrees almost always with the 

 first form. We found only once some individuals whose 

 stamens were more or less transformed into petals, and 

 more or less sterile especially the epipetal stamens. (See 

 fig. 1- 2, page 106). 



Convolvulus Soldanella, L. In the downs in Blanken- 

 berghe, Gynodioeceous. The ^ flowers are large, 40 to 50 

 mm. in diameter, rosy with 5 white path-finders. The 

 general arrangement of the flower resembles that of 

 C. arvense. The two lobes of the stigma are swollen and 

 covered with papillae. The proportional length between 

 style and stamens is most variable. It sometimes occurs 

 that the stigma stands 5 mm. above the top of the anthers, 

 in which case spontaneous self-fertilisation is excluded; 

 sometimes the stigma stands below the top of the anthers: 

 in such a case spontaneous self-fertilisation is possible. 



