224 University of California Puhlications in Botany [Vol. 5 



During this past year the length of the corolla as well as the spread 

 of the corolla, which alone was considered in previous measurements, 

 has been investigated. The term "length of corolla" refers to the 

 distance from the point of insertion of the corolla upon the receptacle 

 to the top of the corolla tube. 



The measurement of corolla length as taken in the field was the 

 distance from the base of the calyx tube to the point where the flat- 

 tened corolla limb bends more or less sharply to join the corolla tube. 

 The measurement of "corolla diameter" or "spread" was taken dur- 

 ing the past two years in the same manner as described in another 

 report for the earlier measurements (1912). 



TABLE 1 

 Variety I, Vakiety II and Hybrids — Spread 



Class centers in mm. 



26 27 28 29 30 31 32 33 



.... 6 



5 8 19 



TABLE 2 

 Variety I, Variety II and Hybrid — -Length 



_,, . Mean 

 Class centers in mm. No. of flower- 

 Designation 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 plants size 

 Varietv I 

 1913 2 1 1 .... 1 .... 2 1 8 50.73 



Variety II 



1913 3 2 7 5 1 ... 1 19 41.34 



I X II F3 



1913 3 1 14646685231 1 51 45.19 



