Ceratophyllum echinatum

Family (Traditional)Ceratophyllaceae
Species:Ceratophyllum echinatum A. Gray
Common NameSpineless Hornwort
Growth Habitforb
Plant Notes**
CharacteristicsArmaments: 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: 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: 1; Fruit Dehiscence: No; Fruit Type: Achene; Fruit Wet/Dry: Dry; Overall Flower Symmetry: Actinomorphic; Sporangium Arrangement: N/A; Stamen Number: 13+
C value 7
StatusNative; AGCP (OBL), EMP (OBL) (NWPL); TN[S1] KY[S2?] (State Rank); G4 (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
  • 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


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: Logan (KY), Carroll (TN), Cumberland (TN), Haywood (TN), McNairy (TN), White (TN)

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

Range of years during which specimens were collected: 1982 - 2015

Accession No. (click for full details) County State Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
TENN-V-0095551 Haywood Tennessee
Ceratophyllum echinatum
APSC0072887 Cumberland Tennessee
Ceratophyllum echinatum
TENN-V-0095553 White Tennessee
Ceratophyllum echinatum
APSC0072888 Cumberland Tennessee
Ceratophyllum echinatum
TENN-V-0095554 White Tennessee
Ceratophyllum echinatum
TENN-V-0095550 Carroll Tennessee
Ceratophyllum echinatum
UCHT035233 White Tennessee
Ceratophyllum echinatum
31973000008934 Logan Kentucky
Ceratophyllum echinatum
TENN-V-0095552 McNairy Tennessee
Ceratophyllum echinatum
APSC0041588 Logan Kentucky 10 Jun 2015 Mason Brock
Ceratophyllum echinatum
APSC0076740 Logan Kentucky 24 Apr 1982 Max Medley
Ceratophyllum echinatum
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