Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Large Bur-reed
Sparganium eurycarpum
Family: Sparganiaceae

Protection Status:
State Status:  E
USFWS Status: {null}

Global Rank: G5
State Rank: S1?

Stream and slough margins; also reported in shallow water.

Species Description:
Perennial herb.

Flowering Period: Early May to late August.

Additional Information at NatureServe

Diagnostic Characteristics:
This species of bur-reed differs from the other two in Kentucky in having fruit (achenes) shaped like an inverted pyramid (widest at tht top) and sessile. The tepals are about as long as the fruit. The flowers have 2 rather than 1 stigma.

Avoid changes in moisture/hydrologic conditions at the site. Changes could result from overstory removal, stream/wetland alteration or vegetation removal that would result in increased erosion.

Global Range:
British Columbia to Newfoundland, south to Baja California, Utah, Missouri, and Florida.

Known Kentucky Occurrences:

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Data last updated: Wednesday, May 28, 2014
Kentucky State Nature Preserves Commission
801 Teton Trail
Frankfort,KY 40601
Phone: (502) 573-2886
Fax: (502) 573-2355
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