Yy > 
cy 
Fic. XII. 
. I. Transverse section of fresh material of leaf-sheath, A blunt 
hair, B rosette, C pointed hair. Oil drops ee on the outside of each 
hair and inside the blunt hair towards the base 
Fig. II. Normal base of pointed hair. 
Fig. II. Base of uninjured pointed hair sos constriction and. oil. 
globules. 
Fig. Iv. Base of blunt hair showing constriction and thin. wall. 
Fig. V. Head of blunt hair. 
Fig. VI—XI. A series of the oo type of hair showing how the con- 
tinuous cuticle layer is broken by the extrusion of the plug. 
Fig. XII. The apex of a po 
idea hate 
Fig. I x 160. Figs. II-IV. and VI-XII x 600. Fig. V diagrammatic. 
