For family description see B. umbellatus.
Hydrocleys and Limnocharis are sometimes included in this family.
1 genus and 1 species from temperate Eurasia (naturalised in N America).
Seed, division and root bulbils.
In parts of Russia the powdered rhizome is made into a bread.
Rhizomatous perennial with linear, rush-like, 3-angled leaves to 1 m long; the flowers have pink petal-like structures.
Source: (2005). Butomaceae. In: . Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.