FERTILISATION. 



85 



in every case. The object of so varying the circumstances was to 

 ascertain whether the fertihsation of the ovules and subsequent ripening 



Fi?. 3. Tiaiis%erbe section of ovarv of 

 CuttUyii Mos^v 



Fig. 4. Transverse section of column. 

 Both twelve times enlarged. 



of the seed would be in any way differently infiacnced o 



thereby. It may here be stated that in the sequel no essential 



were observable. Two days after the operation, 



the floral segments had already become flaccid 



and showed signs of rapidly withering. Under 



the usual cultural treatment the flowers of 



Cattleya Mofsic; retain their freshness for 



upwards of three weeks and even longer in 



cloudy weather; hence the efi"ect of pollination 



on the floral segments becomes perceptible in 



a few hours. The pollinia were found to be 



in course of disintegration, forming with the 



viscid secretion from the stigma a gelntinons 



affected 

 ifterences 



Fig. !J. Groups of poUen granules and tubes. 

 Enlarged 250 times. 



Fig. (). 



