PLATE LV 
Fig. i.—Cross section of a diffuse porous wood, yellow poplar or tulip, showing 
scattered tyloses X 50. T t tylose-filled vessels; V, empty vessels. 
Fig. 2.—Cross section of a ring porous wood, osage orange, with vasicentric paren¬ 
chyma, showing abundantly developed tyloses (T) X 50. 
