5 1 2 Bailey and Thompson.—Notes upon the A ngiosperms. 
DESCRIPTION OF PLATE XVI. 
Illustrating Messrs. Bailey and Thompson’s paper on the Angiosperms Tetracentron , 
Trochodendron, and Drimys. 
Fig. i. Trochodendron aralioides. Transverse section of the secondary xylem, showing growth 
layers, x 90. 
Fig. 2. Drimys colorata. Transverse section of the secondary xylem of a stem, x 90. 
Fig. 3. Drimys colorata. Transverse section of the secondary xylem of a root, showing poorly 
differentiated growth layers, x 90. 
Fig. 4. Drimys Winter i. Transverse section of the secondary xylem of a mature stem, showing 
poorly differentiated growth layers, x 90. 
Fig. 5. Drimys Winteri. Transverse section of the secondary xylem of a young stem, showing 
second, third, and fourth growth layers, x 90. 
Fig. 6. Trochodendron aralioides. Radial longitudinal section of the secondary xylem. x 90. 
Fig. 7. Drimys colorata. Radial longitudinal section of the secondary xylem, illustrating a type 
of pitting that occurs in the stems and roots of many specimens of Drimys. x 90. 
Fig. 8. Drimys colorata. Radial longitudinal section of the secondary xylem, illustrating a type 
of pitting that occurs in the stems and roots of certain specimens of Drimys. x 90. 
Fig. 9. Drimys colorata. Radial longitudinal section of the secondary xylem of an injured root, 
showing supposed ‘vessel-like’ structures, x 125. (After Jeffrey and Cole.) 
Fig. 10. Drimys Winteri. Radial longitudinal section of the secondary xylem of a young stem, 
showing (left) last-formed tracheides of third growth ring and (right) first-formed scalariform 
tracheides of fourth growth layer, x 270. 
Fig. .11. Cycadeoidea Dartoni. Radial longitudinal section of the secondary xylem, showing 
scalariform and transitional types of bordered pitting, x loo. 
Fig. 12. Drimys Winteri. Radial longitudinal section of the secondary xylem, showing circular 
and scalariform bordered pits, such as occur in uninjured stems and roots of many specimens of 
Drimys. x 260. 
