PLATE 28 



WOOD FIBRES 



1. White sandal wood (Santalum album, L.). 



2. Quassia wood (Pier ana excelsa, [Swartz] Lindl.). 



3. Logwood with crystals (Hamatoxylon campechianum, L.) 



4. Black haw root (Viburnum prunifolium, L.). 



