Myriophyllum spicatum

ClassificationDicots
FamilyHaloragaceae
Family (Traditional)Haloragaceae
GenusMyriophyllum
Species:Myriophyllum spicatum L.
Common NameEurasian Watermilfoil
Growth Habitforb
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Invasive Rank: TN-IPC Established Threat; Natural Area Presence: DRU; Natural Area Presence: LC; Natural Area Presence: LGS; Duration: Perennial; General Ecology: Aquatic; Growth Habit: forb; Moisture Requirements: Hydric; Moisture Requirements: Wetland; Region of Origin: Asia; Region of Origin: Europe; Reproductive Phenology: April; Reproductive Phenology: May; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Reproductive Phenology: October; Leaf Arrangement: whorled; Leaf Complexity: compound; Leaf Dissection: 1; Leaf Fragrance: No; Leaf Persistance: Evergreen; Leaf Petiole Type: petiolate; Leaf Type: broadleaf; Leaf Type: linear; Leaf Venation: pinnate; Leaflet Margins: entire; Leaflet Number: 16; Leaflet Number: 17; Leaflet Number: 18; Leaflet Number: 19; Base Flower Color: Green; Carpel Number/Pistil: 0; Carpel Number/Pistil: 1; Carpel Number/Pistil: 2; Carpel Number/Pistil: 3; Carpel Number/Pistil: 4; Fruit Dehiscence: Yes; Fruit Type: Schizocarp; Fruit Wet/Dry: Dry; Overall Flower Symmetry: Actinomorphic; Sporangium Arrangement: N/A; Stamen Number: 0; Stamen Number: 8
C value N/A
StatusNot Native; Invasive; AGCP (OBL), EMP (OBL) (NWPL); TN[SNA] KY[SNA] (State Rank); GNR (Global Rank)
Specimen(s) View and Download Specimen Details »

** Not applicable or data not available.

Currently no photos are available for this plant.

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

Synonyms

SynonymFull Citation
Myriophyllum spicatum var. spicatum Myriophyllum spicatum var. spicatum

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: Boone (KY), Bracken (KY), Campbell (KY), Gallatin (KY), Greenup (KY), Jefferson (KY), Lyon (KY), Marshall (KY), Muhlenberg (KY), Trigg (KY), Anderson (TN), Benton (TN), Campbell (TN), Franklin (TN), Grainger (TN), Hamilton (TN), Henry (TN), Humphreys (TN), Jefferson (TN), Knox (TN), Loudon (TN), Marion (TN), Meigs (TN), Monroe (TN), Polk (TN), Rhea (TN), Roane (TN), Stewart (TN), Unicoi (TN), Van Buren (TN)

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

Range of years during which specimens were collected: 1986 - 2015

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
31234100458684 Greenup Kentucky 22 Oct 1986 Allison W. Cusick
26156
EKY
Myriophyllum spicatum
ETSU006328 Unicoi Tennessee 24 Aug 2015 Frosty Levy
ETSU
Myriophyllum spicatum
31973000013897 Muhlenberg Kentucky
KNK
Myriophyllum spicatum
31973000013893 Bracken Kentucky
KNK
Myriophyllum spicatum
31973000013892 Bracken Kentucky
KNK
Myriophyllum spicatum
31973000013899 Gallatin Kentucky
KNK
Myriophyllum spicatum
31973000013898 Boone Kentucky
KNK
Myriophyllum spicatum
31973000013894 Bracken Kentucky
KNK
Myriophyllum spicatum
31973000013896 Campbell Kentucky
KNK
Myriophyllum spicatum
31973000013895 Campbell Kentucky
KNK
Myriophyllum spicatum
TENN-V-0158668 Jefferson Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158675 Meigs Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158674 Marion Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158660 Anderson Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158667 Humphreys Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158680 Stewart Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158669 Knox Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158666 Hamilton Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158672 Marion Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158671 Loudon Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158784 Trigg Kentucky
TENN
Myriophyllum spicatum
TENN-V-0158662 Campbell Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158664 Franklin Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158676 Rhea Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158661 Benton Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158786 Trigg Kentucky
TENN
Myriophyllum spicatum
TENN-V-0158677 Rhea Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158663 Franklin Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158783 Trigg Kentucky
TENN
Myriophyllum spicatum
TENN-V-0158679 Stewart Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158673 Marion Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158787 Marshall Kentucky
TENN
Myriophyllum spicatum
TENN-V-0158785 Trigg Kentucky
TENN
Myriophyllum spicatum
TENN-V-0158678 Roane Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158659 Anderson Tennessee
TENN
Myriophyllum spicatum
UCHT020911 Tennessee
UCHT
Myriophyllum spicatum
UCHT020910 Marion Tennessee
UCHT
Myriophyllum spicatum
APSC0106373 Campbell Kentucky
APSC
Myriophyllum spicatum
APSC0012750 Bracken Kentucky
APSC
Myriophyllum spicatum
APSC0067600 Meigs Tennessee
APSC
Myriophyllum spicatum
APSC0012749 Henry Tennessee
APSC
Myriophyllum spicatum
APSC0012741 Stewart Tennessee
APSC
Myriophyllum spicatum
APSC0012738 Trigg Kentucky
APSC
Myriophyllum spicatum
TENN-V-0158670 Knox Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158665 Grainger Tennessee
TENN
Myriophyllum spicatum
TENN-V-0158681 Van Buren Tennessee
TENN
Myriophyllum spicatum
UCHT020909 Marion Tennessee
UCHT
Myriophyllum spicatum
APSC0012745 Lyon Kentucky
APSC
Myriophyllum spicatum
APSC0019618 Roane Tennessee
APSC
Myriophyllum spicatum
APSC0012748 Rhea Tennessee
APSC
Myriophyllum spicatum
APSC0012740 Trigg Kentucky
APSC
Myriophyllum spicatum
APSC0012737 Trigg Kentucky
APSC
Myriophyllum spicatum
APSC0012734 Trigg Kentucky
APSC
Myriophyllum spicatum
APSC0012730 Trigg Kentucky
APSC
Myriophyllum spicatum
APSC0012742 Lyon Kentucky
APSC
Myriophyllum spicatum
APSC0012736 Stewart Tennessee
APSC
Myriophyllum spicatum
APSC0012732 Trigg Kentucky
APSC
Myriophyllum spicatum
APSC0114698 Campbell Kentucky
APSC
Myriophyllum spicatum
APSC0015359 Roane Tennessee
APSC
Myriophyllum spicatum
APSC0012731 Stewart Tennessee
APSC
Myriophyllum spicatum
APSC0012733 Trigg Kentucky
APSC
Myriophyllum spicatum
UCHT038337 Polk Tennessee
UCHT
Myriophyllum spicatum
APSC0015360 Monroe Tennessee
APSC
Myriophyllum spicatum
APSC0012735 Stewart Tennessee
APSC
Myriophyllum spicatum
APSC0114697 Jefferson Kentucky
APSC
Myriophyllum spicatum
APSC0012743 Lyon Kentucky
APSC
Myriophyllum spicatum
APSC0015365 Loudon Tennessee
APSC
Myriophyllum spicatum
APSC0012739 Stewart Tennessee
APSC
Myriophyllum spicatum
APSC0106372 Jefferson Kentucky
APSC
Myriophyllum spicatum
APSC0012747 Marshall Kentucky 18 Sep 2008 David H. Webb
APSC
Myriophyllum spicatum
APSC0114699 Bracken Kentucky
APSC
Myriophyllum spicatum
BEREA024321 Campbell Kentucky
BEREA
Myriophyllum spicatum
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