E. S. Salmon and H. Wormald 



247 



sible exception of one plant, II 35 ( ? ) which was under observation for 

 two seasons only when it became diseased and had to be destroyed; the 

 records for II 35 during those two years were G?- (1918), Gr (1919). 

 Another plant which approaches the "green" bine forms is W 49 ((/), 

 which from 1918 to 1920 was recorded as g and r (1918), Gr (1919), 

 g and r (1920), and which therefore on the whole finds its place with the 

 " mottled " plants. 



Plants with red bines are by far the most numerous; in typical 

 examples the colour is recorded as consistently Rg, R (g) or R, or as 

 fluctuating from Rg to RigY. One plant, OF 28, is an extreme type 

 which produces very dark, purplish red bines distinguishing it from all 

 the other plants in the garden. 



The colour of the petioles is correlated with that of the bines ; the 

 upper surface is usually reddish and darker than the lower side, the red 

 colour being the more deeply defined on the plants with red bines. 

 Summarized, the distribution of the red colour with respect to the colour 

 of the bine is as follows : 



Colour of petiole 



1 Parlatore (Flora Italiana, Vol, iv. 303 (1867)) writes, in his description of //. lupulus 

 <'I1 fusto ^...verdognolo o in parte rossiccio." It would appear therefore that forms with 

 dark red bines were not obsei-ved by him. 



