Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Illinois Pondweed
Potamogeton illinoensis
Family: Potamogetonaceae

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

Global Rank: G5
State Rank: S2

Calcareous waters of lower gradient streams, lakes, and ponds.

Species Description:
Aquatic perennial herb.

Flowering Period: May-September

Additional Information at NatureServe

Diagnostic Characteristics:
An aquatic species with the submersed leaves 50 mm wide which is large for this group of plants. The leaves are flat, with 7-19 veins and have petioles shorter than the blades and the floating leaves are ovate to oblong with abruptly pointed tip.

Changes in hydrologic conditions would likely be detrimental. Changes could result from overstory removal, stream/wetland alteration or vegetation removal that would result in increased erosion or deterioration of water quality.

Global Range:
Ranges from Quebec to British Columbia south to southern California, Utah, New Mexico, and Texas.

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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