Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

River Bulrush
Bolboschoenus fluviatilis
Family: Cyperaceae

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

Global Rank: G5
State Rank: S1S2

Marshes, standing water, and fresh-tidal or freshwater shores, tolerant of alkali (Weakley 2011); riverbanks.

Species Description:
Perennial sedge.

Flowering Period: Early May to late September.

Additional Information at NatureServe

Diagnostic Characteristics:
The stems are sharply 3-sided and the leaves are well distributed along the plant and 6-16 mm wide. The leaves are flat and the leaf sheath is convex. The bracts underneath the inflorescence are spreading, leafy and very unequal. The bristles at the base of the furit (achene) are equal to or surpassing the fruit.

Changes in hydrology or moisture conditions in the wetlands where this species occurs would be detrimental. Pest plants, especially common reed (Phragmites australis), are a threat to this species.

Global Range:

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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