Butomus umbellatus L.

Flowering Rush

Emergent, erect, aquatic perennial herb to 1.5 m tall with a starchy rhizome. Leaves in tufts, linear, in 2 rows along the rhizome, parallel veined and 3-edged, purplish at first. Flower cluster an axillary cymose umbel with 3 bracts; summer. Flowers bisexual, regular, fragrant, about 2.5 cm wide, anthers and young ovaries dark red. Perianth in two whorls of 3 segments, the outer ones greenish, the inner ones pink. Stamens 6-9. Ovary inferior of 6 carpels that are open at the tip and united at the base and each containing numerous ovules. Fruit a whorl of separate follicles.


Source: Spencer, R. (2005). Butomaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.

Distribution map
kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Lilianae
order      Alismatales
family       Butomaceae
genus        Butomus L.