蒲團

praying mat (Buddhism, made of woven cattail)

surname Pu / old place name

refers to various monocotyledonous flowering plants including Acorus calamus and Typha orientalis / common cattail / bullrush

round / lump / ball / to roll into a ball / to gather / regiment / group / society / classifier for a lump or a soft mass: wad (of paper), ball (of wool), cloud (of smoke)

The Carnal Prayer Mat, Chinese erotic novel from 17th century, usually attributed to Li Yu 李漁|李渔[Li3 Yu3]