Butomus umbellatus

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Legend for Species Pages

[edit] Flowering-rush

• Present in Alberta – Yes
• Global Invasive Species Database – Yes [1]
• NatureServe Rank – Medium
• Haber, Upland – No
• Haber, Wetland – Principal
• CWF, Status & Invasive Range – High, PQ, E. & S.W. Ontario, AB, BC, MN, NS
• Alberta Revegetation Guidelines – No
• The Nature Conservancy – Yes
• CBCN – Low
• AB Weed – Prohibited Noxious

[edit] Remarks

Has been reported in Alberta, a serious invader in other regions --- nip this one in the bud if you can! Listed by ISSG.

[2] Link to ISSG Global Invasive Species Database entry for Butomus umbellatus L.

This plant can grow in submerged, emergent, and wet terrestrial environments. In the western part of it's range, it tends to grow in monotypic stands, reproducing vegetatively. This form is triploid, and more aggressive than the diploid plants which occur in the east. Production of bulblets and seed is low in triploid plants, and they are self-sterile. They disperse mainly by fragmentation of rhizomes, so pulling can be counter-productive.

Reported at Lake Isle boat launch - one flowering plant noted in a small patch July 6 2008 by Todd Kemper. Also previously reported in Alberta in the Red Deer area and along the river near Bow City.

[3] Link to USDA Plants Profile, Butomus umbellatus L. - flowering rush

[4] Link to NatureServe I-Rank information for Butomus umbellatus - L. Flowering-rush

Photo: L. Gillespie, Town of Innisfail

Photo: L. Gillespie, Town of Innisfail

Briutton and Brown (1913)