Pollen morphology of Heliotropioideae in Boraginaceae from China and its systematic significance
1Jia-Xi LIU; 2Yi-Zhen XI*; 2Yu-Long ZHANG; 2Jian-Chang NING; 1Xiao-Rui LIU
J Syst Evol . 2008, (6): 891 -898 .  DOI: 10.3724/SP.J.1002.2008.07171