Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Sessile-fruited Arrowhead
Sagittaria rigida
Family: Alismataceae

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

Global Rank: G5
State Rank: S1

Swamps and ponds in shallow water.

Species Description:
Perennial herb.

Flowering Period: Early July to late October.

Additional Information at NatureServe

Diagnostic Characteristics:
Wetland plant with sepals spreading to recurved in fruit, all flowers unisexual. Petioles, peduncles and pedicels slender and firm. Leaves unlobed and usually linear-lanceolate but the immersed leaves may have lobes. Scape is weak and often bent at the lowest whorl of flowers. Lowest fruiting heads sessile or with pedicels less than 1 cm. Beak of achenes 0.8-1.4 mm.

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:

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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