A distinctive species of the cooler subtropical forests of western and southern Bhutan, usually found between 1,500m and 2,000m. Culms are up to 15m long, and up to 5cm in diameter, with internodes up to 1m in length. The straggling clumps have long pendulous culm tips, and very large leaves for the size of the culms. The ridged culm sheaths with thin edges and tall shoulders distinguish this from the similar species Cephalostachyum capitatum. The leaf sheaths also have tall shoulders, and both culm and leaf sheaths have long white bristles when young. The bristles are delicate and deciduous, leaving hardly any trace once they have fallen. Culm nodes and
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