Mud sedge Buckbean
Carex limosa Menyanthes trifoliata  
n = 1
III.A.3.j.  Subarctic Lowland Sedge Bog Meadow
Ecosystem: Relict Drainageway

Mud sedge (Carex limosa) - buckbean (Menyanthes trifoliata) has not been described for Alaska, though a few mud sedge types have been classified (Viereck et. al., 1992).

On the Kenai lowlands it was found in only one location, the edge of Sevena Lake in a large relict glacial drainageway, northeast of Mackey Lake.  Much of the southern shore is occupied by it.

Tussocks of mud sedge with water horsetail (Equisetum fluviatile) occupy micro-highs, while micro-lows, often with standing water, are occupied by buckbean, and marsh fivefinger (Comarum palustre).  

The site is a floating organic mat 140 centimeters thick extending over open water.  pH was measured at 5.67.  It is a jurisdictional wetland.

Table 1.  Summary of plant cover.

      Wetland Indicator Status


 % Cover    Alaska National
Chamaedaphne calyculata   0.5 FAC FAC
Salix1 fuscescens   0.5 FACW FACW
Carex limosa 15.0 OBL OBL
Menyanthes trifoliata1 10.0 OBL OBL
Comarum palustre 7.0 OBL OBL
Carex chordorrhiza   7.0 OBL OBL
Equisetum fluviatile 3.0 OBL OBL
Pedicularis macrodonta  1.0 np
Agrostis scabra Willd. 0.5 FAC FAC, FAC+
Eriophorum angustifolium   0.5 OBL OBL
Carex stipata 0.5 OBL OBL
Carex magellanica 0.5 OBL OBL
Dwarf Shrubs
Andromeda polifolia 0.5 OBL OBL
Open water 3.0
Bare soil 0.5      
1 Plant with known morphological adaptation for occurrence in wetlands (USACE, 1987)


 Introduction and Key to Plant Communities  

Introduction and Key to Ecosystems

    Kenai Hydric Soils    Map Unit Summary    Methods    Glossary

Contact: Mike Gracz
Kenai Watershed Forum 
PO Box 15301
Fritz Creek, AK  99603
The Alaska Natural Heritage Program
Environment and Natural Resource Institute
University of Alaska, Anchorage
707 A Street, Suite 101
Anchorage, Alaska  99501

04 May 2007 09:38