Print Report
A1752 Podostemum ceratophyllum Aquatic Vegetation Alliance
Type Concept Sentence: This alliance is widely scattered in the eastern United States where Podostemum ceratophyllum forms monotypic or near-monotypic stands on rocks in moderate- to fast-flowing streams.
Common (Translated Scientific) Name: Hornleaf Riverweed Aquatic Vegetation Alliance
Colloquial Name: Eastern Hornleaf Riverweed Aquatic Vegetation
Hierarchy Level: Alliance
Type Concept: This alliance is found in the eastern one-third of the United States. This almost always is a monospecific community dominated by Podostemum ceratophyllum with no other vascular plants present; some Rhodophyta (red algae) may be present. This alliance is found on shoals in rocky streambeds and riverbeds in mature drainage systems where the streams have cut down to rock, and the floodplain is relatively narrow; or on dams in moderately fast- to fast-flowing water. The vegetation grows attached to rocks in outcrops and stream rubble, or to dams in moderate- to fast-flowing water.
Diagnostic Characteristics: Riverbed and streambeds dominated by Podostemum ceratophyllum. Few other species are common.
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This alliance has just one undifferentiated association of Podostemum ceratophyllum bars and shoals. Compare this to Justicia americana-dominated vegetation. Vegetation of this alliance has been documented from the Sepulga River in the East Gulf Coastal Plain of Alabama. In the Interior Low Plateau of Tennessee, this vegetation is known from the upper Duck River at Manchester (Old Stone Fort State Park).
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: The low-lying herbaceous vegetation grows attached to rocks in outcrops and stream rubble, or to dams in moderate- to fast-flowing water.
Floristics: This alliance is almost always a monospecific community dominated by Podostemum ceratophyllum with no other vascular plants present; some Rhodophyta (red algae) may be present.
Dynamics: No Data Available
Environmental Description: This alliance includes vegetation of shoals in rocky streambeds and riverbeds in mature drainage systems where the streams have cut down to rock, and the floodplain is relatively narrow; or on dams in moderately fast- to fast-flowing water. It tends to be associated with higher pH streams which cut through diabase, limestone or calcareous shales.
Geographic Range: This alliance is widely scattered in the eastern one-third of the United States with some occurrences in Louisiana and Oklahoma.
Nations: CA?,US
States/Provinces: AL, AR, CT, DE, GA, KY, LA?, MA, MD, ME, NC, NH, NJ, NY, OK, PA, QC?, RI, SC, TN, VA, VT
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.899171
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 5 Aquatic Vegetation Class | C05 | 5 |
| Subclass | 5.B Freshwater Aquatic Vegetation Subclass | S13 | 5.B |
| Formation | 5.B.2 Temperate to Polar Freshwater Aquatic Vegetation Formation | F057 | 5.B.2 |
| Division | 5.B.2.Na North American Freshwater Aquatic Vegetation Division | D049 | 5.B.2.Na |
| Macrogroup | 5.B.2.Na.1 Hornwort species - Pond-lily species - Pondweed species Eastern North American Freshwater Aquatic Vegetation Macrogroup | M108 | 5.B.2.Na.1 |
| Group | 5.B.2.Na.1.a American White Water-lily - Sago Pondweed - Pondweed species Freshwater Aquatic Vegetation Group | G114 | 5.B.2.Na.1.a |
| Alliance | A1752 Hornleaf Riverweed Aquatic Vegetation Alliance | A1752 | 5.B.2.Na.1.a |
| Association | CEGL004331 Hornleaf Riverweed Aquatic Vegetation | CEGL004331 | 5.B.2.Na.1.a |
Concept Lineage: This alliance equals old A.1752.
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
- DuMond, D. M. 1970. Floristic and vegetational survey of the Chattooga River Gorge. Castanea 35:201-244.
- Faber-Langendoen, D., J. Drake, M. Hall, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, L. Sneddon, K. Snow, and J. Teague. 2013-2019b. Screening alliances for induction into the U.S. National Vegetation Classification: Part 1 - Alliance concept review. NatureServe, Arlington, VA.
- Hoagland, B. W. 1998a. Classification of Oklahoma vegetation types. Working draft. University of Oklahoma, Oklahoma Natural Heritage Inventory, Norman. 43 pp.
- Nelson, J. B. 1986. The natural communities of South Carolina: Initial classification and description. South Carolina Wildlife and Marine Resources Department, Division of Wildlife and Freshwater Fisheries, Columbia, SC. 55 pp.
- Schafale, M. P., and A. S. Weakley. 1990. Classification of the natural communities of North Carolina. Third approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh. 325 pp.
- Tobe, J. D., J. E. Fairey, III, and L. L. Gaddy. 1992. Vascular flora of the Chauga River Gorge, Oconee County, South Carolina. Castanea 57:77-109.