The materials used are numerous; but the principal substances are straw, the bulrushes Typha elephantina and Typha angustifolia, leaves of the date palm (Phoenix sylvestris), of the dwarf palm (Chamaerops Ritchiana), of the Palmyra palm (Borassus flabelliformis), of the coconut palm (Cocos nucifera) and of the screw pine (Pandanus odoratissimus), the munja or munj grass (Saccharum Munja) and allied grasses, and the mat grasses "Cyperus textilis" and "Cyperus pangorei.