4Q2 BOTANICAL GAZETTE [November 



LITERATURE CITED 

 i American trees. iqo8. 1 



Buckhout, W 

 5:259. 1907. 



Quarterly 



3. Busgen, M., Bau und Leben unserer Waldbaume. 1897. p. 62 



4. Coulter, J. M., and Chamberlain, C. J., Seed plants. 1901 



5. Goff, E. S., The resumption of root growth in spring. Wis 



fig 



Hartig 



7- , Anatomie und Physiologie der Pflanzen. 1891. p. 262. 



8. Hartig, T., Bot. Zeit. 18:829. 1858. 



9. Hastings, G. T., When increase in thi 

 12:585. 1900. 



■ 



10. Mer, E., Sur les causes de variatio] 

 Bot. France 39:95. 1892. 



11. Penhallow. D. P.. Anatomv of t.h 



Science, N.S. 



Bull. Soc. 



Japan 



12. 



Reuss, H., Beitr. zur Wachstumsthatigkeit des Baumes nach praktischen 

 Beobachtungsdaten des laufenden Starkenzuwachsganges an der Sommer- 

 rinde. Forstlich. Zeitschr. 2: 145. 1893. 



13. Strasbu 



14. Wieler, 



1879. 



1m 



der Baume. Bot. Zeit. 56:262. 1898. 



XXV 



May 



Fig. i.— Cutting taken from apical shoot of tree III April 15, i9 IQ 5 

 cambium in the resting condition ; X50. 



Fig. 2.— Same, but cutting taken about 1 m. from the apex; cambium in 

 the resting condition ; X50. 



Fig. 3.— Same, but cutting taken about 2 m. from the apex; growth in 



evidence to the extent of one or two partly formed tracheids; X5°- 

 Fig. 4. 



just beginning at A; compare with fig. 15X50. 



Fig. 5.— Same, but cutting taken 1 m. from the apex; growth slightly 

 more advanced; compare with fig. 2; X50. 



Fig. 6.— Same, but cutting taken from the apex; growth in evidence to 

 the amount of 3 or 4 tracheids; compare with fig. 3; X5°- 



Fig. 7.— Cutting taken from tree III April 15, 1910, about 3 m. from the 

 apex; growth in evidence to the extent of one or two partly formed tracheids; 

 X 50. 



Fig. 8.— Same, but cutting taken about 4 m. from the apex; growth in 

 evidence to about the same extent as in fig. 7 ; X 50. 



