Carex divisa Huds. Divided Sedge
Fl.Angl. 348 (1762)

Conservation Code: Not threatened
Naturalised Status: Alien to Western Australia
Name Status: Current

Brief Description
Grazyna Paczkowska, Sunday 31 October 1993

Monoecious, rhizomatous, tufted, colonial perennial, grass-like or herb (sedge), 1 m high. Fl. brown/green, Sep to Dec. Sandy clay, black peaty sand. Swamps.

Distribution

Beard’s Provinces: South-West Province.

IBRA Regions: Jarrah Forest, Swan Coastal Plain.

IBRA Subregions: Perth, Southern Jarrah Forest.

Local Government Areas (LGAs): Bridgetown-Greenbushes, Bunbury, Busselton, Canning, Gosnells, Manjimup, Perth, Stirling, Wanneroo.

Management Notes (for the Swan NRM Region)
Kate Brown and Karen Bettink, Thursday 21 December 2017

General Biology. Growth form. Sedge. Life form. Perennial. Reproduction. Rhizomes and seed. Dispersal. Water, soil movement, possibly animals. Fire response. Possibly tolerant to fire due to thick rhizomes.

Notes. Widely naturalised in temperate regions. Possesses thick, woody rhizomes. Likely to be tolerant of frost, salt and water logging. Salinity inhibits germination of seed.

Additional information. Origin. Northern Africa, Europe, temperate and tropical Asia. History of use/introduction. Stream bank stabilisation.

Suggested method of management and control. Physically control only in small or isolated populations. Try 1% glyphosate. Read the manufacturers' labels and material safety data sheets before using herbicides. For further information consult the Australian Pesticides and Veterinary Medicines Authority to determine the status of permits for your situation or state.

Management Calendar

Calendar Type Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Comments
Active Growth             Y Y Y Y      
Germination             U U U        
Flowering                 Y Y Y Y  
Fruiting U                   U U  
Manual Removal Y Y Y Y Y Y Y Y Y Y Y Y  
Herbicide Treatment               Y Y Y      

Legend: Y = Yes, regularly, O = Occasionally, U = Uncertain, referred by others but not confirmed.

 

References

  • Brown, K. & Brooks, K. (2002) Bushland Weeds: A Practical Guide to their Management. Environmental Weeds Action Network, Greenwood.
  • Department of Primary Industries (2009) Invasiveness Assessment - Divided Sedge (Carex divisa) in Victoria. State of Victoria URL: http://www.land.vic.gov.au/dpi/vro/vrosite.nsf/pages/invasive_divided_sedge - Accessed February 2010.
  • Esmaeili, M.M., Bonis, A., Bouzille, J.B., Mony, C. & Benot, M.L. (2009) Consequence of ramet defoliation on plant clonal propagation and biomass allocation: Example of five rhizomatous grassland species. Flora, 204: 25-33.
  • Esmaeili, M.M., Sattarian, A., Bonis, A. & Bouzille, J.B. (2009) Ecology of seed dormancy and germination of Carex divisa Huds.: Effects of stratification, temperature and salinity. International Journal of Plant Protection, 3 (2): 1735-6814.
  • Hussey, B.M.J., Keighery, G.J., Dodd, J., Lloyd, S.G. & Cousens, R.D. (2007) Western Weeds. A guide to the weeds of Western Australia. 2nd Edition. The Plant Protection Society of Western Australia, Victoria Park.
  • Moore, C.B. & Moore, J.H. (2002) Herbiguide, the pesticide expert on a disk. Herbiguide, PO Box 44 Albany, Western Australia, 6330.

Project information and acknowledgements