Remark: This genus has about 60 species, distributed in cosmopolitan. In Taiwan there are 7 species. The floating islands and reed boats in Lake Titicacaare are weaved by species of the genus.

• 附注：本属植物约有60种，分布于全世界；台湾有7种。在南美洲的”的喀喀湖”中的浮岛与草船是用本属植物编制。