258 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4O 



The following branches are examples of postseasonal growth for 

 the year 1940. 



TTC 5-2 (cut March 25, 1940) 



Sections a, 87 cm, from the tip: 180° lenses one cell thick represent 1940. 

 Sections b, 67 cm. from the tip, show the same growth. 



TTC 5-3 (cut June 23, 1940) 

 Sections a, 91 cm. from the tip: i see and i s lens plus i d lens for 1940. 



TTC 5-4 (cut July 17, 1940) 



Sections a, 87 cm. from the tip : i wide see for 1940. 



Sections b, 47 cm. from the tip: i narrow ce for 1940. Here the sharpness 

 of the outer margin subsides outward on the branch. 



TTC 5-5 (cut August 1, 1940) 



Sections a, 56 cm. from the tip: i see plus 2 s lenses for 1940. 

 Sections b, 16 cm. from the tip : l see only. 



TTC 5-6 (cut August 17, 1940) 



Sections a, 89 cm. from the tip : i see plus i psL plus a 100° incomplete lens, 

 one to two cells thick, for 1940. Here the immature growth may well be post- 

 seasonal. 



Sections b, 45 cm. from the tip : i see plus i msce plus i ms lens plus a series 

 of short, imlignified, incomplete lenses of postseasonal growth for 1940. 



More growth occurred in b than in a. 



TTC 5-7 (cut September 10, 1940) 



Sections a, 74 cm. from the tip : the annual increment for 1940 contains I see 

 plus a slight hint of postseasonal growth of a cell or two just under the cambium. 



Sections b, 41 cm. from the tip: have, in contrast, i see plus I d lens plus 

 postseasonal growth of two immature, incomplete lenses one cell thick. 



TTC 5-8 (cut September 28, 1940) 



Sections o, 72 cm. from the tip : i see plus 2 s lenses plus psg for 1940. The 

 psg consists of scattered cells and two short lenses, all of immature cells. 



Sections b, 14 cm. from the tip : i see plus i s lens plus psg. Only an immature 

 cell or two represents the psg this far out on the branch which has increasing 

 multiplicity inward. 



TTC 5-9 (cut November 9, 1940) 



Sections a, 69 cm. from the tip : one long concurrent s lens system plus a few 

 immature cells as postseasonal growth for 1940. 



Sections b, 34 cm. from the tip : no postseasonal growth could be seen. 



TTC 5-10 (cut February i, 1941) 



Sections a, 53 cm. from the tip: no visible postseasonal growth. 

 Sections b, at 36 cm., show the same. 



