<正> 组5.大叶苧麻组 Sect Duretia Bl.Mus.Bot.Lugd.-Bat.2:212.1856,p.p.——subgen.Duretia(Bl.)Satake in Journ.Fac.Sci.Univ.Tokyo,sect.Ⅲ,4:478.1936,p.p. Frutex,suffrutex vel herba perennls.Folia opposita,raro subverticillatavel nonnula alternata.Glomeruli in spicam vel paniculam hand foliiferamdispositi.Flores masculini subsessiles vel breviter pedicellati,(tri-)tetrameri.