Myriophyllum heterophyllum

ClassificationDicots
FamilyHaloragaceae
Family (Traditional)Haloragaceae
GenusMyriophyllum
Species:Myriophyllum heterophyllum Michx.
Common NameTwoleaf Watermilfoil
Growth Habitforb
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Natural Area Presence: LC; Duration: Perennial; General Ecology: Aquatic; Growth Habit: forb; Moisture Requirements: Hydric; Moisture Requirements: Wetland; Region of Origin: North America; 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: 4; Fruit Dehiscence: Yes; Fruit Type: Schizocarp; Fruit Wet/Dry: Dry; Overall Flower Symmetry: Actinomorphic; Sporangium Arrangement: N/A; Stamen Number: 0; Stamen Number: 4
C value 6
StatusNative; AGCP (OBL), EMP (OBL) (NWPL); TN[SNR] KY[S3?] (State Rank); G5 (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

No synonyms exist for this species.

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: Fulton (KY), Livingston (KY), Meade (KY), Muhlenberg (KY), Cumberland (TN), Franklin (TN), Hamilton (TN), Lauderdale (TN), Montgomery (TN), Putnam (TN), White (TN)

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

Range of years during which specimens were collected: 1969 - 1987

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used
BEREA015079 Putnam Tennessee
BEREA
Myriophyllum heterophyllum
TENN-V-0158648 White Tennessee
TENN
Myriophyllum heterophyllum
TENN-V-0158647 Putnam Tennessee
TENN
Myriophyllum heterophyllum
TENN-V-0158642 Cumberland Tennessee
TENN
Myriophyllum heterophyllum
TENN-V-0158727 Fulton Kentucky
TENN
Myriophyllum heterophyllum
UCHT020908 Hamilton Tennessee
UCHT
Myriophyllum heterophyllum
31234100458635 Cumberland Tennessee 02 Aug 1979 Botany 4045 Field Trip Participants: W. Michael Dennis, Paula Nakosteen, T.A. Farmer, Jane Comiskey, Vernon McNeilus, Tom Patrick
s.n.		 EKY
Myriophyllum heterophyllum
31234100458577 Fulton Kentucky Raymond Athey
 EKY
Myriophyllum heterophyllum
31234100458627 Cumberland Tennessee 20 May 1987 Ronald L. Jones
4749		 EKY
Myriophyllum heterophyllum
TENN-V-0158726 Fulton Kentucky
TENN
Myriophyllum heterophyllum
TENN-V-0158644 Franklin Tennessee
TENN
Myriophyllum heterophyllum
APSC0114319 Meade Kentucky
APSC
Myriophyllum heterophyllum
APSC0063200 Cumberland Tennessee
APSC
Myriophyllum heterophyllum
31234100458619 Cumberland Tennessee 05 Sep 1987 Ronald L. Jones
5377		 EKY
Myriophyllum heterophyllum
BEREA015080 White Tennessee
BEREA
Myriophyllum heterophyllum
TENN-V-0158643 Cumberland Tennessee
TENN
Myriophyllum heterophyllum
TENN-V-0158640 Cumberland Tennessee
TENN
Myriophyllum heterophyllum
TENN-V-0158641 Cumberland Tennessee
TENN
Myriophyllum heterophyllum
TENN-V-0158728 Livingston Kentucky
TENN
Myriophyllum heterophyllum
TENN-V-0158645 Lauderdale Tennessee
TENN
Myriophyllum heterophyllum
APSC0105589 Livingston Kentucky 09 Jul 1969 Raymond Athey
 APSC
Myriophyllum heterophyllum
TENN-V-0158639 Cumberland Tennessee
TENN
Myriophyllum heterophyllum
APSC0115436 Meade Kentucky
APSC
Myriophyllum heterophyllum
APSC0114643 Fulton Kentucky
APSC
Myriophyllum heterophyllum
APSC0096063 Muhlenberg Kentucky
APSC
Myriophyllum heterophyllum
TENN-V-0158646 Montgomery Tennessee
TENN
Myriophyllum heterophyllum
TENN-V-0158638 Cumberland Tennessee
TENN
Myriophyllum heterophyllum
APSC0086731 Livingston Kentucky 06 Oct 1986 Max Medley
 APSC
Myriophyllum heterophyllum
First Page Previous Page Next Page Last Page
Records per Page:

Plant Photos