There is an accompanying volume with illustrations.
The eighth volume, numbered 6 in the series, treats the pink (Caryophyllaceae), lotus (Nelumbonaceae), water lily (Nymphaeaceae), fanwort (Cabombaceae), hornwort (Ceratophyllaceae), euptelea (Eupteleaceae), trochodendron (Trochodendraceae), tetracentron (Tetracentraceae), katsura (Cercidiphyllaceae), peony (Paeoniaceae), buttercup (Ranunculaceae), circaeaster (Circaeasteraceae), and lardizabala (Lardizabalaceae) families, represented in China by 1382 species.