A study on fruit morphology of Polygonum sect. Polygonum (Polygonaceae) from China
HOU Yuan-Tong, XU Chong-Mei, QU Chang-You, BA Xiao-Ge, LU Fa-Jun, LI Fa-Zeng
J Syst Evol . 2007, (4): 523 -537 .  DOI: 10.1360/aps050113