BOTANICAL GAZETTE [Marcu 
EXPLANATION OF PLATES VII AND VIII 
Fic. 1.—Transverse section of woody stem of Solidago canadensis; X10. 
Fic. 2.—Lateral leaf trace segment of same more highly magnified 
Fic. 3.—Tangential view of same; X60. 
IG. 4.—Radial view of same; X60. 
5.—Transverse section of upper and more herbaceous region of 
S. canadensis; K15 
1G. 6.—Lateral leaf trace segment of same more highly magnified; 120 
IG. 7.—Transverse view of section of S. sempervirens showing multiplica- 
tion of leaf traces; X12. 
Fic. 8.—Leaf trace bundle of same section more highly magnified; 
Fic. 9.—Transverse section of woody stem of Helianthus hirsutus; X x0 
Fic. 10.—Transverse section of S. graminifolia; 
Fic. 11.—Part of thinner cylinder of same species more highly magnified; 
X 150. 
Fic. 12.—Transverse view of section of Aster multiflorus; X12. 
