OF DIMOKPHIC AND TlUMOliPHIC PLANTS. 



407 



Table (continued). 



Class IY, — Illegitimate ^plants from the short-styled form^ fertilized by pollen 



from the longer staviens of the long -styled form. 



\ 







* 





Calculated average 







Average 



Maximum 



Minimum 



of seeds relatively to 



Number of 



Pomi. 



number of 



number in 



number in 



the normal stan- 



Experimentt 



A \^M ^ A A # 



seeds pro- 



any one 



any one 



dard, this being 







duced. 



capsule. 



capsule. 



taken in each case 



1 

 1 





43-0 



1 





as 100. 



Exp. XXI. 



Short-stjled 



63 



26 



52 



XXII. 



Do. 



100-5 



123 



86 



121 



XXIII. 



Do. 



113-5 



123 



93 



136 



XXIV. 



Long-styled 



82-0 



120 



67 



88 



XXV. 



Do. 



122-5 



149 



84 



131 



4 



Class V. — Illegitimate plants from the mid-styled form, fertilized by pollen from 



the shorter sfa/nens of the long -styled for^n. 



Exp. XXVI. 



Mid-styled... 



86-0 



109 



61 



66 



XXVII. 



Do. 



99-4 



122 



53 



76 



XXVTII. 



Do. 



89-0 



119 



69 



08 



XXIX. 



Long- sty led 



100-0 



121 



77 



107 



XXX. 



Do. 



940 



106 



66 



101 



XXXI. 



Do. 



1 



90-6 



97 



79 



98 



Class VI. — Illegitimate plants from the mid-styled form, ferti 



the longer stameiis of the short-styled form 



Exp. xxxn. 



XXXIII. 



Mid -styled... 



Short-styled 



127-2 

 113-9 



144 



137 



98 



90 



98 

 137 



The lessened fertility of most of these illegitimate plants is in many 

 respects a highly remarkable phenomenon. Thirty-three plants 

 m the six classes were subjected to various trials, and the seeds care- 

 fully counted. Some were artificially fertilized, but the far greater 

 numberwere freely fertilized(and this is the better and natural plan) 

 through the agency of insects, by other illegitimate plants. In the 

 right-hand or percentage column in the accompanying Table, a wide 

 difference in fertility between the plants in the first three and thelast 

 three classes may be perceived. In the first three classes the plants 

 are descended from the three forms illegitimately fertilized bypoUen 

 taken from the same form, but not from the same individual plant. 

 It is necessary to observe this latter circumstance; for, as I shall 

 at some future time show *, most plants, independently of dimor- 



* I have given a brief abstract of some of these obserrations in my work on 



* The Variation of Animals and Plants under Domestication/ 1867, vol. ii. 

 p. 128. 



