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flowering rush

Scientific Name: Butomus umbellatus

Family: Butomaceae

Category: Monocot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Flowering Rush (Butomus umbellatus)

Flowering Rush, scientifically known as Butomus umbellatus, is also commonly referred to as grass rush or water gladiolus.

Considerations for Pets and Children

  • The plant features sharp 3-cornered linear leaves.
  • It grows from root rhizomes and bulbils.

Quirky Facts

  • The flowers are said to have a delicate-almond scent.
  • The flowers emerge "onion-style" from a clove consisting of three pointed green bracts.

Taxonomy and Nomenclature

  • Scientific Name: Butomus umbellatus L.
  • Family: Butomaceae (also known as the flowering-rush family)
  • The genus Butomus consists of only one species, umbellatus.

Distribution and Habitat

  • Native to North Africa and Europe, extending north to Scandinavia and east across much of the Northern Hemisphere.
  • It has been introduced to other regions and is found along lakeshores and in slow-moving rivers.
  • Specifically mentioned as present in southern Manitoba and Lake County, Montana.

Ecological Role

  • Flowering Rush is considered an invasive species in many regions, including Minnesota, the Great Lakes area, and Manitoba.
  • It can displace native riparian vegetation and obstruct boat traffic.
  • Dense stands can reduce water quality, potentially disrupting fish and wildlife habitats.

Morphological Characteristics

  • A perennial aquatic plant that can reach heights of up to 1.5 meters (approximately 5 feet).
  • It resembles a large sedge.
  • Stems are erect and triangular.
  • Leaves are sword-like and triangular.
  • Flowers are white or pale pink, arranged in a large umbel. They are typically 0.75-1 inch in size with deep pink to red stamens and 3 oval petals.
  • Leaves are basal, linear and rush like, triangular below, sheathing at the base and somewhat twisted.

Cultivation

  • Prefers a sunny position and moist, boggy soil.
  • Hardy to zone 5 (UK).
  • Flowers from July to September.

Interactions with Other Organisms

  • May provide cover for waterfowl, but its invasive nature can crowd out native species.
  • Mentioned as restricting flow in an irrigation ditch, indicating its potential to impact water management.

Further Information

  • The RHS (Royal Horticultural Society) offers information on Butomus umbellatus.
  • MSU (Michigan State University) Department of Land Resources has research associated with Hilary Parkinson.
  • USDA Symbol: BUUM
  • ODA rating: A and T.