Fig. 4

Phytoliths extracted from the pottery residues (li and guan) at the Mijiaya site. Bulliform (a-d), rectangular (e), rice bulliform (f–h), parallel bilobates from the rice (i, j), bilobate (k), rondel (l), elongate echinate (m), double-peaked glume cells from the rice husk (o, p), acicular (n, r), η-shaped phytoliths from the broomcorn millet husk (q), multicellular phytolith with long saddle?(s), smooth-elongate (t); the phytoliths (i, q, s) are from the guan pottery, and others are from the li pottery