About 200 species: temperate and arctic regions of both hemispheres, usually along shores of saline lakes, also on mountains in the tropics; 50 species (14 endemic) in China.

• 大约200种：温带和两半球的北极地区，通常沿着含盐湖的岸，也在在热带内的山上；中国有50种(14特有种)。