Pseudostachyum polymorphum is a monotypic Asian species of bamboo in the grass family.Munro, William. 1868. Transactions of the Linnean Society of London 26(1): 141-142 descriptions in Latin, commentary in EnglishMunro, William. 1868. Transactions of the Linnean Society of London 26(1): plate IV (4), figure B (at right) line drawing of Pseudostachyum polymorphum
It is the only known species of the genus Pseudostachyum. The plant is found in Assam, Arunachal Pradesh, Bhutan, Myanmar, Vietnam, Thailand, and southern China (Yunnan, Guangdong, Guangxi).
Formerly included see Melocalamus Neohouzeaua Pseudostachyum compactiflorum - Melocalamus compactiflorus Pseudostachyum glomeriflorum - Melocalamus compactiflorus Pseudostachyum helferi - Neohouzeaua helferi
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