342 



AMERICAN JOURNAL OF BOTANY 



[Vol. 8, 



/4 



4 



I; 



: 







; 



. 



/43 



H=-0002 + 2-139 P 

 = 12-224 + 0-033 7&amp;gt; 



4 $ 



139 



SB 



=/0 -941 + 0-301 P 



7S 



= 



H=4-/30+/-3S2 P 

 =/2 -928-0 -I7Q P 



//= 3-175+1-507 P 

 = // -915+ 0-090 P 



JJOUBLE BUMZLES 



DIAGRAM 2. Regression of number of bundles in central region of hypocotyl and in 

 central region of epicotyl on number of primary double bundles at base of hypocotyl in di 

 merous seedlings. Empirical means represented by solid dots for hypocotyl and by circles 

 for epicotyl. 



The correlation coefficients between the two classes of bundles which 

 have been recognized at the base of the hypocotyl and the total number of 

 basal bundles (i.e., the sum of the number of primary double bundles and 

 the number of intercalary bundles in the base of the hypocotyl) and the 

 number in the central region of the hypocotyl, appear in table i. 



