Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Dwarf Burhead
Echinodorus tenellus var. parvulus
Family: Alismataceae

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

Global Rank: G3Q
State Rank: S1

Sandy shores, low fields.

Species Description:
Annual or short lived perennial.

Flowering Period: Early July to late October.

Additional Information at NatureServe

Diagnostic Characteristics:
Plants diminutive (less than 10 cm tall ) and often forming dense mats. Plants occur in open wetlands. Leaves are lance-linear (5-8 mm wide) and thickened apically. Flower pistils are numerous and densely packed over the surface of the receptacle (referring to the common name burhead), fewer than 20 pistils in this species. Anthers are basifixed (attached in the middle). Flowers have three white petals and 9 stamens.

Avoid changes in moisture/hydrologic conditions at the site. Changes could result from overstory removal, stream/wetland alteration or impacts due to erosion. Exotic pest plant are a threat and should be removed.

Global Range:
Texas to Florida, north locally to Massachusetts, New York, Michigan, Illinois, Missouri and Kansas. Although widely distributed, it is considered rare, historical or extirpated in almost every state in its 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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