260 



University of California Publications in Agricultural Sciences [Vol. 2 



TABLE 6 

 The Eesults from the Cross of Leaf Forms. Sc X sc 



SCALAEIS e28 (Sc) 

 Plate 47, figure 1 



This pinnatifid leaf form was isolated in 1919 ; it originated from 

 a single plant which was a sib to the one producing the scalaris e29 

 race. These two forms have much in common, but are different in 

 size, e28 being smaller and not so vigorous as e29, and having shorter 

 and blunter lobes. 



Two races of the pinnatifid leaf forms isolated from the Berkeley 

 (H6) race of plants and from the Eureka population (e28), respec- 

 tively, differ in a number of minor characters, as shown in the follow- 

 ing comparative list : 



H6 (Berkeley) 



dark green 



dark green to blackish 



pronounced 



pronounced 



none 



pronounced 



blunt and rounded 



rounded 



wide (very) 



pronounced 



large 



Characters 



color of leaf 



color of midrib 



anthocyanin 



crimping of rib-wing 



rib hairs 



black edge on leaf 



terminal lobe 



lateral lobe 



lobe spacing 



Constricted base of lobes 



secondary lobes 



e28 (Eureka) 

 dark green 

 light green 

 none or trace 

 none 

 present 

 trace only 

 narrow — pointed 

 slender — more pointed 

 wide (medium) 

 none or trace 

 none 



