PLATE 48 



B. 



Cross-section of kava-kava root (Piper methysticum, Forst., i.). 



1. Unequal diameter medullary ray cells. 



2. Vessels. 



3. Wood parenchyma. 



4. Wood fibres. 



Cross-section of white pine bark {Pinus strobus, L,). 



1. Wavy medullary rays with tannin. 



2. Parenchyma cells. 



3. Sieve cells. 



