22 



Miss E. R. Saunders. On a Discontinuous 



Table VII. 



Classification of 120 Cross-bred Seedl 



Number of seedlings derived from five 

 hairy plants x smooth (hairs want- 

 ing or confined to the lobes) plants. 



Number of seedlings derived from five 

 smooth (hairs wanting or confined to 

 the lobes) plants x hairy plants. 



Number of seedlings derived from one 

 plant, surface smooth, marginal hairs 

 numerous x hairy plant. 



Surface 

 hairy. 



4 



12 



Surface 

 intermediate, 



32 



Surface 

 smooth. 



26 



28 



Totals. 

 37 



65 



18 



Totals 



45 



54 



120 



Table VIII. 



Classification of the same 120 Cross-bred Seedlings arranged in 

 Families. 



Offspring of five Offspring of 



hairy plants fertilised five very smooth plants 



by very smooth plants. fertilised by hairy plants. 

 Plant Plant Plant Plant Plant Plant Plant Plant Plant Plant 



Type of earlier leaves. 



Surface hairy ...... 



Surface intermediate. 



Surface smooth, ex- 

 cept for 1-2 hairs at 

 the leaf teeth ; hairs 



1. 



2. 



3. 



4. 5. 



1. 2. 



3. 



4. 



5. 



f- 





1 



1 



— 3 



t 



2 — 







-> 

 3 



1 



3 



1 



1 1 



12 — 



6 



8 



6 



3 



4 



1 



2 — 



2 — 



3 



4 



2 



Offspring 

 of one rather 

 smooth 

 plant 

 fertilised 

 by hairy 

 plant. 



12 

 6 



Surface smooth, hairs 

 on margins 7 



Surface smooth, hairs 

 on lobes — 



Quite smooth — 



8 1 — 



10 



Totals 11 15 4 3 4 18 



19 14 13 



18 



In all the "very smooth " plants nsed as parents in these experi- 

 ments, the leaf-surface was quite smooth, and if marginal hairs 

 were present they were confined to the leaf-teeth. In the 

 " rather smooth" plant there were numerous hairs on the mar- 

 gins and leaf-teeth. 

 From the observations made upon this one generation of cross- 

 breds, it would appear that when the extreme forms are intercrossed 

 the offspring seldom exhibit the degree of hairiness characteristic 

 of the more hairy parent ; in most cases the first formed leaves corre- 



