II. I)...'. 1SI. 



PLATE XXVI. 



E 



A 



WSCMOLL. 



TRANSVERSE RESIN DUCTS TANGENTIAL VIEWS. 



A-C, PINUS TJ5DA. D and E, P. PALUSTRIS. F, P. ECHINATA. G, P. HETEROPHYI.LA. r. d.. resin ducts; tr., transverse tracheids; 



p., parenchyma. 

 Magnification of originals, {; of illustrations, 3 {. 



