Ceratophyllum demersum

ClassificationDicots
FamilyCeratophyllaceae
Family (Traditional)Ceratophyllaceae
GenusCeratophyllum
Species:Ceratophyllum demersum L.
Common NameCoons Tail; Hornwort
Growth Habitforb
Plant Notes**
CharacteristicsArmaments: No; Milky Sap: No; Photosynthetic: Yes; Stipules: No; Woody Herbaceous: Herbaceous; Natural Area Presence: GRSM; 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: North America; Reproductive Phenology: May; Reproductive Phenology: June; Reproductive Phenology: July; Reproductive Phenology: August; Reproductive Phenology: September; Leaf Arrangement: whorled; Leaf Complexity: compound; Leaf Dissection: 0; Leaf Dissection: 1; Leaf Dissection: 2; Leaf Fragrance: No; Leaf Persistance: Evergreen; Leaf Petiole Type: petiolate; Leaf Type: broadleaf; Leaf Type: linear; Leaf Venation: dichotomous; Leaf Venation: palmate; Leaflet Margins: serrate; Leaflet Number: 2; Leaflet Number: 3; Leaflet Number: 4; Base Flower Color: Brown (incl. Maroon); Base Flower Color: Green; Carpel Number/Pistil: 0; Fruit Dehiscence: No; Fruit Type: Achene; Fruit Wet/Dry: Dry; Overall Flower Symmetry: Actinomorphic; Sporangium Arrangement: N/A
C value 4
StatusNative; AGCP (OBL), EMP (OBL) (NWPL); TN[SNR] KY[S4S5] (State Rank); G5 (Global Rank)
Specimen(s) View and Download Specimen Details »

** Not applicable or data not available.

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
Ceratophyllum apiculatum Ceratophyllum apiculatum Cham.
Ceratophyllum demersum var. apiculatum Ceratophyllum demersum var. apiculatum (Cham.) Aschers.

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: Ballard (KY), Bath (KY), Boone (KY), Bracken (KY), Breathitt (KY), Calloway (KY), Campbell (KY), Casey (KY), Clinton (KY), Daviess (KY), Gallatin (KY), Graves (KY), Greenup (KY), Hardin (KY), Henderson (KY), Hickman (KY), Hopkins (KY), Jefferson (KY), Knox (KY), Lyon (KY), Madison (KY), Marshall (KY), Montgomery (KY), Nicholas (KY), Oldham (KY), Pendleton (KY), Rowan (KY), Trigg (KY), Benton (TN), Carroll (TN), DeKalb (TN), Fayette (TN), Gibson (TN), Hamilton (TN), Hardin (TN), Houston (TN), Humphreys (TN), Lake (TN), Lauderdale (TN), Lewis (TN), Marion (TN), Maury (TN), Monroe (TN), Montgomery (TN), Obion (TN), Rhea (TN), Roane (TN), Scott (TN), Shelby (TN), Stewart (TN)

Herbaria represented by specimen data listed below: APSC, BEREA, BOON, EKY, HTTU, KNK, MDKY, MEM, SWMT, TENN, UCHT, UTM

Range of years during which specimens were collected: 1937 - 2000

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
31234100357209 Madison Kentucky 08 Jul 1975 J. Stuart Lassetter
2435
EKY
Ceratophyllum demersum
31234100357100 Casey Kentucky 11 Jul 1988 Bruce Hoagland
EKY
Ceratophyllum demersum
BEREA012075 Bracken Kentucky
BEREA
Ceratophyllum demersum
BEREA012076 Casey Kentucky
BEREA
Ceratophyllum demersum
BEREA012077 Rowan Kentucky
BEREA
Ceratophyllum demersum
BEREA012074 Bath Kentucky
BEREA
Ceratophyllum demersum
31973000008930 Bracken Kentucky
KNK
Ceratophyllum demersum
31973000008931 Greenup Kentucky
KNK
Ceratophyllum demersum
31973000008923 Campbell Kentucky
KNK
Ceratophyllum demersum
31973000008922 Pendleton Kentucky
KNK
Ceratophyllum demersum
31973000008927 Rowan Kentucky
KNK
Ceratophyllum demersum
31973000008928 Boone Kentucky
KNK
Ceratophyllum demersum
31973000008924 Montgomery Kentucky
KNK
Ceratophyllum demersum
31973000008925 Madison Kentucky
KNK
Ceratophyllum demersum
31973000008929 Gallatin Kentucky
KNK
Ceratophyllum demersum
MDKY00009280 Breathitt Kentucky
MDKY
Ceratophyllum demersum
TENN-V-0095529 Humphreys Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095531 Lake Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095527 Hamilton Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095540 Obion Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095543 Obion Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095534 Lake Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095532 Lake Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095542 Obion Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095524 Carroll Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095537 Marion Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095546 Roane Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095545 Rhea Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095541 Obion Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095533 Lake Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095548 Scott Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095569 Hickman Kentucky
TENN
Ceratophyllum demersum
TENN-V-0095536 Lewis Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095528 Hardin Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095544 Rhea Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095547 Scott Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095538 Montgomery Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095549 Stewart Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095526 Gibson Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095525 DeKalb Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095535 Lauderdale Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095539 Montgomery Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095530 Houston Tennessee
TENN
Ceratophyllum demersum
TENN-V-0095570 Marshall Kentucky
TENN
Ceratophyllum demersum
UCHT011683 Lake Tennessee
UCHT
Ceratophyllum demersum
UCHT011682 Marion Tennessee
UCHT
Ceratophyllum demersum
UCHT011680 DeKalb Tennessee
UCHT
Ceratophyllum demersum
013804 Obion Tennessee
BOON
Ceratophyllum demersum
013803 Calloway Kentucky
BOON
Ceratophyllum demersum
APSC0018727 Lyon Kentucky
APSC
Ceratophyllum demersum
APSC0054494 Maury Tennessee
APSC
Ceratophyllum demersum
APSC0018735 Rhea Tennessee
APSC
Ceratophyllum demersum
APSC0018725 Monroe Tennessee
APSC
Ceratophyllum demersum
APSC0087705 Hardin Kentucky
APSC
Ceratophyllum demersum
APSC0115787 Graves Kentucky
APSC
Ceratophyllum demersum
APSC0020623 Rhea Tennessee
APSC
Ceratophyllum demersum
APSC0018730 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0018737 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0089798 Henderson Kentucky
APSC
Ceratophyllum demersum
APSC0018721 Lyon Kentucky
APSC
Ceratophyllum demersum
APSC0018729 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0115789 Jefferson Kentucky
APSC
Ceratophyllum demersum
APSC0038496 Stewart Tennessee
APSC
Ceratophyllum demersum
APSC0018724 Trigg Kentucky
APSC
Ceratophyllum demersum
APSC0115784 Ballard Kentucky
APSC
Ceratophyllum demersum
APSC0051159 Maury Tennessee
APSC
Ceratophyllum demersum
APSC0088273 Humphreys Tennessee
APSC
Ceratophyllum demersum
APSC0018733 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0089797 Henderson Kentucky
APSC
Ceratophyllum demersum
APSC0091308 Obion Tennessee
APSC
Ceratophyllum demersum
APSC0018719 Stewart Tennessee
APSC
Ceratophyllum demersum
APSC0018736 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0087707 Ballard Kentucky
APSC
Ceratophyllum demersum
APSC0091293 Obion Tennessee
APSC
Ceratophyllum demersum
APSC0018722 Stewart Tennessee
APSC
Ceratophyllum demersum
APSC0056351 Benton Tennessee
APSC
Ceratophyllum demersum
APSC0115793 Jefferson Kentucky
APSC
Ceratophyllum demersum
APSC0038494 Humphreys Tennessee
APSC
Ceratophyllum demersum
APSC0042530 DeKalb Tennessee
APSC
Ceratophyllum demersum
APSC0084746 Ballard Kentucky
APSC
Ceratophyllum demersum
APSC0018732 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0115790 Daviess Kentucky
APSC
Ceratophyllum demersum
APSC0115791 Ballard Kentucky
APSC
Ceratophyllum demersum
APSC0071451 Oldham Kentucky
APSC
Ceratophyllum demersum
APSC0018720 Trigg Kentucky
APSC
Ceratophyllum demersum
APSC0018739 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0018728 Montgomery Tennessee
APSC
Ceratophyllum demersum
APSC0018723 Trigg Kentucky
APSC
Ceratophyllum demersum
APSC0115788 Hardin Kentucky
APSC
Ceratophyllum demersum
APSC0088272 Stewart Tennessee
APSC
Ceratophyllum demersum
HTTU006626 Hickman Kentucky
HTTU
Ceratophyllum demersum
HTTU006625 Hickman Kentucky
HTTU
Ceratophyllum demersum
TENN-V-0244294 Monroe Tennessee
TENN
Ceratophyllum demersum
TENN-V-0244295 Rhea Tennessee
TENN
Ceratophyllum demersum
UCHT035232 Hickman Kentucky
UCHT
Ceratophyllum demersum
UTM00354 Obion Tennessee
UTM
Ceratophyllum demersum
UTM00353 Obion Tennessee
UTM
Ceratophyllum demersum
UTM00356 Obion Tennessee
UTM
Ceratophyllum demersum
UTM00355 Obion Tennessee
UTM
Ceratophyllum demersum
UTM02675 Obion Tennessee
UTM
Ceratophyllum demersum
SWMT00900 Tennessee 21 May 1938 J. H. D.
SWMT
Ceratophyllum demersum
SWMT00903 Tennessee 15 May 1937 John H. Davis
SWMT
Ceratophyllum demersum
MEM015822 Fayette Tennessee 04 Oct 1980 Vernon Bates Jr.
1955
MEM
Ceratophyllum demersum
MEM014267 Lake Tennessee 07 Oct 1978 Fred Deneke
178
MEM
Ceratophyllum demersum
MEM020817 Hardin Kentucky 01 Aug 1982 Max E. Medley, Ray Cranfill
5636-82
MEM
Ceratophyllum demersum
MEM009058 Shelby Tennessee 01 Sep 1971 John E. Thompson Jr.
469
MEM
Ceratophyllum demersum
MEM012919 Ballard Kentucky 18 Oct 1977 Raymond Athey
3896
MEM
Ceratophyllum demersum
31234100357142 Henderson Kentucky 28 Aug 1980 Richard H. Hannan
5270
EKY
Ceratophyllum demersum
31234100357217 Nicholas Kentucky 04 Jun 1997 Ronald L. Jones
8190
EKY
Ceratophyllum demersum
31234100357118 Casey Kentucky 25 Jun 1980 J. Stuart Lassetter
3537
EKY
Ceratophyllum demersum
31234100357134 Clinton Kentucky 27 Jun 2000 Mark A. Gorton
00-358
EKY
Ceratophyllum demersum
31234100357159 Casey Kentucky 23 Jul 1978 Mary Lou Branson
46
EKY
Ceratophyllum demersum
31234100357183 Knox Kentucky 24 Jul 1992 John D. Williams
11
EKY
Ceratophyllum demersum
31234100357167 Henderson Kentucky 01 May 1980 Richard H. Hannan
3640
EKY
Ceratophyllum demersum
31234100357225 Obion Tennessee 02 Oct 1971 Elizabeth M. Browne
71K1.3
EKY
Ceratophyllum demersum
31234100357191 Madison Kentucky 15 Jun 1973 J. Stuart Lassetter
1975
EKY
Ceratophyllum demersum
31234100357233 Obion Tennessee 30 Sep 1995 Timothy J. Weckman
2122
EKY
Ceratophyllum demersum
31234100357175 Hopkins Kentucky 21 Jul 1992 Earl Sparks
EKY
Ceratophyllum demersum
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Plant Photos

Ceratophyllum demersum - Theo Witsell
Ceratophyllum demersum - Theo Witsell