Dendrocalamus sinicus
Dendrocalamus sinicus, the dragon bamboo, is a gigantic clumping bamboo native to Yunnan Province of China and to Laos. It has the largest culms of any known species of bamboo; up to wide with culm walls up to thick and the culm up to height. Each culm can weigh up to apiece. A plant eventually consists of about one hundred culms. This species was unknown to mainstream science prior to 1980, although well known to the citizens of Yunnan and Laos for centuries.