ON STIPULES 



39 



indications of being tridentate at the apex. These 

 lateral teeth are probably evidence of the former exist- 



us 



us 



52 



54 



Leaves of Exochorda. 



I'm. .">i. -Leaf of Exochorda grand ifiora^ nat. size. 



Fi<:. (3. Transverse section of petiole at 3 mm. from base, x 12 ; US, upper 



surface ; W, win jr. 

 Fk;. 58. Leaf of Kxoehorda .\/!>,r/i, nat. size ; St, stipule. 

 Fie. 54.- Transverse section of petiole at 3 mm. from base, xl2; US, upper surface. 



ence of stipules. The petiole of the lower leaves also 

 sometimes shows short teeth at its upper end, which 

 also probably represent the last trace of stipules. 



