206 THE STRUCTURE OF FLOWERS. 



by distinct plants. The difference, however, being only two 

 in each ease, is practically inappreciable. 



Of the other genera, Linum shows a slight inclination in 

 favour of short-styled; but as this genus is exceedingly 

 barren when illegitimately fertilised, the resnlts here given 

 of that plant are insufficient for deducing conclusions ; at 

 all events, these tables show that the long -styled form is 

 certainly more prolific when illegitimately fertilised^ than the 

 short-styled form when similarly treated.* 



ILLEGITIMATE OR HOMOMORPHIC UNIONS. 



' "ToQ^low"? 

 Referring to the column of Differences in the first table, 

 it will be noticed that two of the four marked (f) of the long- 

 styled are considerable, namely, P. veris and Hottonia ; but the 



* Mr. Darwin noticed that this was the case with the genus Prinmla 

 (Ix., p. 48). 



