Nov., 1923] BAILEY — CAMBIUM AND DERIVATIVE TISSUES 509 
Fig. 4. Robinia Pseudo-Acacia L. Tangential longitudinal section of stratified 
lateral meristem of highly specialized type of dicotyledon, showing parallel horizontal 
series of fusiform initials. X no. 
Fig. 5. Heritiera littoralis Dryand. Tangential longitudinal section of immature 
phloem, showing stratified elements. X no. 
Fig. 6. Diospyros virginiana L. Tangential longitudinal section of stratified lateral 
meristem. Fusiform initial {A) has divided radio-longitudinally. X no. 
Fig. 7. Same. Portion of cambium more highly magnified. Cells A and B have 
formed radio-longitudinal, anticlinal partitions. Cell C is dividing periclinally. The 
kinoplasmasomes are approaching the ends of the cell. X 148. 
Fig. 8. Liquidambar Styraciflua L. Tangential longitudinal section of non-stratified 
lateral meristem, showing oblique anticlinal division of fusiform initial. X 450. 
Fig. 9. Same. Oblique anticlinal division. X 450. 
