94 
Campbell . — Osmunda claytoniana , 
Fig. ioo. Section of young cotyledon of 0 . cinnamomea. g, glandular hair. 
Fig. ioi. Cross-section of petiole of nearly full-grown cotyledon of 0 . clay- 
toniana (. xy, xylem of vascular bundle. 
Fig. 102. Cross-section of the apical cell of the first root of 0 . cinnamomea. 
Alcohol — alum-cochineal — Bismarck-brown. 
Fig. 103. Longitudinal section of the young primary root of 0 . claytoniana ; PI. 
plerome. 
