6o 



BOTANICAL GAZETTE 



[JULY 



Fig. 15. — Transverse section of part of a two-year-old peduncle of Quercus 

 coccinea, showing multiseriate rays; X80. 

 . Fig. 16. — Transverse section of traumatic tissue of Castanea dentata, 

 showing oaklike multiseriate rays and fibers recalled by the stimulating effects 

 of Endothia parasitica; X 130. 



Fig. 17. 



onary 



of Quercus virginiana, showing wide multiseriate ray subtended by protoxylem; 

 X 20. 



Fig. 18. — Reversionary leaf of Castanea dentata, showing oaklike characters 

 recalled by the stimulating effects of Endothia parasitica; X^. 



Fig. 19. — Transverse section of the first formed portion of a depressed 

 segment of a vigorous shoot of Quercus velutina; multiseriate rays radiate from 



primary 



X45. 



Fig. 20. — Transverse section of the first formed portion of a very vigorous 

 root of Castanea dentata, showing vestiges of multiseriate rays; X 15. 



Fig. 21. 



Q 



ing the recurrence of multiseriate rays under the stimulating effects of an 

 injury; X5. 



