Named after Pu'er city in Yunnan. Two main types: 生普 (raw, ages slowly) and 熟普 (ripe, artificially fermented in the 1970s to mimic aged raw). Sold in compressed 饼 (cakes), 砖 (bricks), or 沱 (nests).
usage
Note the apostrophe in pǔ'ěr — required before ě to mark the syllable boundary.