Elodea nuttallii

Classification	Monocots
Family	Hydrocharitaceae
Family (Traditional)	Hydrocharitaceae
Genus	Elodea
Species:	Elodea nuttallii (Planch.) H. St. John
Common Name	Western Waterweed
Growth Habit	forb
Plant Notes	**
Characteristics	Armaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Duration: Perennial; General Ecology: Aquatic; Growth Habit: forb; Moisture Requirements: Hydric; Moisture Requirements: Wetland; Region of Origin: North America; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Leaf Arrangement: whorled; Leaf Complexity: simple; Leaf Dissection: 0; Leaf Fragrance: No; Leaf Persistance: Deciduous; Leaf Petiole Type: sessile; Leaf Type: broadleaf; Leaf Venation: one-veined; Leaflet Margins: entire; Leaflet Number: 0; Base Flower Color: Pink; Base Flower Color: White; Fruit Dehiscence: No; Fruit Type: Capsule; Fruit Wet/Dry: Dry; Overall Flower Symmetry: Actinomorphic; Sporangium Arrangement: N/A; Stamen Number: 9
C value	5
Status	Native; AGCP (OBL), EMP (OBL) (NWPL); TN[S2] KY[S2?] (State Rank); G5 (Global Rank)
Specimen(s)	View and Download Specimen Details »

** Not applicable or data not available.

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Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display the its name. Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

State Boundaries
Counties
Counties - Species Present

Ecoregions

Southeastern Plains
- Blackland Prarie
Blue Ridge Mountains
Ridge and Valley
Cumberland Plateau
Cumberland Mountains
Allegheny Plateau

Interior Plateau
- Bluegrass Region
- Nashville Basin
- Pennyroyal Karst Plain
- Western Highland Rim
- Eastern Highland Rim

Interior River Valleys and Hills
- Shawnee / Caseyville Hills
Mississippi Alluvial Plain
Mississippi Valley Loess Plains
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Synonyms

Synonym	Full Citation
Anacharis nuttallii	Anacharis nuttallii Planch.
Anacharis occidentalis	Anacharis occidentalis (Pursh) Marie- Vict.
Elodea columbiana	Elodea columbiana St.John
Elodea minor	Elodea minor Farwell
Elodea nuttalli	Elodea nuttalli (Planch.) H. St. John
Elodea occidentalis	Elodea occidentalis St.John
Philotria angustifolia	Philotria angustifolia Britton ex Rydb.
Philotria minor	Philotria minor Small
Philotria nuttallii	Philotria nuttallii Rydb.
Philotria occidentalis	Philotria occidentalis House
Udora verticillata var. minor	Udora verticillata var. minor Engelm.

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort.

Counties included on distribution map: Madison (KY), Anderson (TN), Bedford (TN), Campbell (TN), DeKalb (TN), Hamilton (TN), Hawkins (TN), Lake (TN), Loudon (TN), Marion (TN), Montgomery (TN), Obion (TN), Roane (TN), Sullivan (TN)

Herbaria represented by specimen data listed below: APSC, BEREA, EKY, ETSU, KNK, MEM, TENN

Range of years during which specimens were collected: 1972 - 2019

Accession No. (click for full details)	County	State	Coll. Date	Collector & Collection No.	Herbarium & Herbarium Name Used
31234100094950	Madison	Kentucky		Gary W. Libby	EKY Elodea nuttallii
BEREA004595	DeKalb	Tennessee	22 Jul 1986	Ralph L. Thompson 86-647	BEREA Elodea nuttallii
N/A	Obion	Tennessee	13 Jul 1986	Milo Guthrie 1183	APSC Elodea nuttallii
APSC0091291	Obion	Tennessee			APSC Elodea nuttallii
31234100094927	Madison	Kentucky		Donna Perkins	EKY Elodea nuttallii
31973000014125	Madison	Kentucky			KNK Elodea nuttallii
TENN-V-0014553	Hamilton	Tennessee			TENN Elodea nuttallii
TENN-V-0014559	Marion	Tennessee			TENN Elodea nuttallii
APSC0038425	Loudon	Tennessee			APSC Elodea nuttallii
N/A	Lake	Tennessee	28 May 1986	Milo Guthrie 965	APSC Elodea nuttallii
MEM007650	Lake	Tennessee	06 Oct 1972	Elizabeth M. Browne, Edward T. Browne Jr. 72J1.3	MEM Elodea nuttallii
TENN-V-0014557	Lake	Tennessee			TENN Elodea nuttallii
TENN-V-0014564	Sullivan	Tennessee			TENN Elodea nuttallii
APSC0038424	Roane	Tennessee			APSC Elodea nuttallii
APSC0038428	Obion	Tennessee			APSC Elodea nuttallii
TENN-V-0014554	Lake	Tennessee			TENN Elodea nuttallii
TENN-V-0014561	Obion	Tennessee			TENN Elodea nuttallii
TENN-V-0014563	Sullivan	Tennessee			TENN Elodea nuttallii
TENN-V-0014550	Campbell	Tennessee			TENN Elodea nuttallii
N/A	Hawkins	Tennessee	13 Oct 2019	Frosty Levy, Elaine Walker	ETSU Elodea nuttallii
31234100094943	Roane	Tennessee	11 Jul 1990	V. E. McNeilus 90-494	EKY Elodea nuttallii
TENN-V-0014556	Lake	Tennessee			TENN Elodea nuttallii
TENN-V-0014551	Anderson	Tennessee			TENN Elodea nuttallii
TENN-V-0014558	Lake	Tennessee			TENN Elodea nuttallii
TENN-V-0014562	Roane	Tennessee			TENN Elodea nuttallii
31234100094935	Madison	Kentucky		J. Skidmore	EKY Elodea nuttallii
TENN-V-0014560	Montgomery	Tennessee			TENN Elodea nuttallii
TENN-V-0014552	Bedford	Tennessee			TENN Elodea nuttallii
APSC0038429	Lake	Tennessee			APSC Elodea nuttallii
TENN-V-0014555	Lake	Tennessee			TENN Elodea nuttallii
TENN-V-0014565	Sullivan	Tennessee			TENN Elodea nuttallii
TENN-V-0243552	Roane	Tennessee			TENN Elodea nuttallii
TENN-V-0243551	Loudon	Tennessee			TENN Elodea nuttallii
ETSU026980	Hawkins	Tennessee	13 Oct 2019	Frosty Levy, Elaine Walker 191136	ETSU Elodea nuttallii

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Elodea nuttallii

Related Links

Species Distribution Map

Ecoregions

Synonyms

Specimens and Distribution

Plant Photos