为虎耳草科植物青棉花藤的根。青棉花藤，又名：青棉花藤根、竹麻、大藤、猴头藤、纸加藤、猴大绳、红棉毛藤。
其他材料的收集和处理：其他材料包括竹、麻、蓑草、棕、棕榈叶、玉米皮、席草、蒲草、麦秆、水草等材料。
Other material collecting and processing: other materials including bamboo, flax, coir, palm, palm leaf, corn hulls, mat grass, cattail stem and float glass .
分析结果表明，麻竹表型性状的地理变异趋势是以经向变异为主，纬向与垂直变异不明显。
The analysis has shown that the geographical variation trend of phenotypic traits has given priority to longitude, and no obvious variation in latitude and altitude.
到了宋代，竹、褚皮取代麻而成为主要的造纸原料。
By Song Dynasty, the bamboo, Chu peel replaced rough papermaking raw materials which become main.
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