PLATE 48 
A, Cross-section of kava-kava root (Piper methysticum, Forst., f.). 
1. Unequal diameter medullary ray cells. 
2. Vessels. 
3. Wood parenchyma. 
4. Wood fibres. 
B. Cross-section of white pine bark (Pinus strobus, L.). 
1. Wavy medullary rays with tannin. 
2. Parenchyma cells. 
3. Sieve cells. 
