[baker] 



VESTIGIAL CENTRIPETAL XYLEM 



57 



.o.cp.p. 



.u. cp. 





Fig. 8. — Pinus strobus. 



Adult long, radial above protoxylem — x 300. 



e. — Endodermis; p. — Parenchyma; px. — 

 Protoxylem; tti, tt2 and ttp., inner, outer, 

 and pitting of, transfusion tissue; v.cp. — 

 Vestigial centripetal xylem; v.cp. p. — Pit- 

 ting on v.cp. 



Fig. 9. — Pinus strobus. 



Adult, long, tang, above protoxylem — x 320. 



e. — Endodermis; p. — Parenchyma; tt. — transfusion tissue; 

 tt.p. — Pitting on tt; v.cp. — Vestigial centripetal xylem; 

 v.cp.p. — Pitting on v.cp. 



