440 BOTANICAL GAZETTE [JUNE 
20 
15 
10 
5 
ee 
Rie 
60 ~ 
‘ 
45} ‘38 \. TOTAL DUCT CAPACITY 
¥\ 7s | 
6) ‘eye R ese gc, 
/\ es a 
15 oS TN 
ea ne ae 5D 
5A = 50 Cs ae 
; 
60] 3 
7 a 
a5} 4... MEAN DUCT CAPACITY 
; SBN. oo 
1 ™“, me ; 
30 ; Se ee 
beak bait a 
‘ie oe 
SAA oe 
2:6 4:9 6 7-6.5 1 {2 I4 160 bo 2 
Fic. 5.—Abscissae represent successive leaves of various rosettes, ordinates the 
respective characters measured in each set of graphs; S, seedlings; R, rejuvenated 
rose 
