Sagittaria lichuanensis — A Newly Recorded Species in Alismataceae from Guizhou Province Karyotypical Studies on Caldesia grandis Samuel., A Rare and Endangered Marsh Plant in China NOTES RELATING TO FLORA OF HUNAN:Ⅱ. CARYOPHYLLACEAE,FAGACEAE, UM BELLIFERAE,RUBIACEAE, COMPOSITAE,ALISMATACEAE STUDIES ON THE PHYLOGENETIC RELATIONSHIPS OF CHINESE SAGITTARIA (ALISMATACEA) Production of male flowers does not decrease with plant size in insect-pollinated Sagittaria trifolia, contrary to predictions of size-dependent sex allocation The Karyotypical Study on Sagittaria tengtsungensis H. Li——An Endemic Plant from China THE GEOGRAPHICAL DISTRIBUTION OF ALISMATACEAE IN SOUTHWESTERN HUBEI Pollen Morphology of the Alismataceae Caldesia Parl., A New Record Genus of Alismataceae to Laos Flora Organogenesis of Ranalisma rostratum(Alismataceae)