6; see text Callitriche palustris, the vernal water-starwort,[3] narrow-fruited water-starwort,[4] or spiny water starwort, is a species of aquatic plants.

It is the type species of its genus.

It is native to temperate and subtropical North America and Eurasia, as well as Sumatra and Borneo.

[2] Six subspecies and varieties are accepted.

[2]