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Yellowstone County, Montana
Noxious Weed
Weed Information Contact Department

Flowering Rush
(Butomus umbellatus)

Flowering Rush Aquatic

Flowering Rush Root

Flowering Rush lEAF

Flowering Rush Stem

Flowering Rush Bloom

Flowering Rush Mature


Growth Habit: A perennial, emergent aquatic herb that grows to a height of 1 meter.

Leaves: Leaves grow upwards from the rhizome at the base of the plant on opposite sides of the stem. Leaves are approximately 1 meter long and approximately 1 cm wide. They have smooth edges are triangular in cross section. Veins run parallel to the edge of the leaf. The ends of the leaves are twisted.

Stem: Stem is leafless, and grows taller than the leaves to over a height of 1 meter.

Flower: Flowering occurs throughout the summer but high water can hinder or prevent flowering. The flower is made up of 3 petals and 3 sepals. Flower color ranges from deep pink to white and the sepals occasionally have a slight green tinge.

Roots: Thick, creeping rhizome.

Seeds: Seeds are dark brown beaked fruits.

Reproduction: Reproduces mainly by rhizomes and seeds. Seeds are long lived thus enabling its ability to disperse.

Habitat: Riparian Areas or areas with shallow or slow-moving water.

Biological Control


Video Supplied By Montana Weed Control Association