Watsonia marginata (L.f.) Ker Gawl.
Bot.Mag. 17:Tab.608 (1802)

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

Brief Description
Amanda Spooner, Thursday 16 August 2007

Cormous, perennial, herb, to 1.5 m high. Fl. violet/white/pink, Oct to Dec. Red-brown loam, sand over limestone. Along track edges, road verges.

Distribution

Beard’s Provinces: South-West Province.

IBRA Regions: Jarrah Forest, Swan Coastal Plain.

IBRA Subregions: Northern Jarrah Forest, Perth, Southern Jarrah Forest.

Local Government Areas (LGAs): Armadale, Bridgetown-Greenbushes, Bunbury, Busselton, Dardanup, Donnybrook-Balingup, Gosnells, Harvey, Kalamunda, Mundaring, Murray, Perth, Swan.

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

Alternative Names. Fragrant Bugle Lily.

General Biology. Growth form. Geophyte. Life form. Annually renewed corm, some dormancy between fire. Reproduction. Offsets, seed. Dispersal. Water, soil, wind. Time to first flowering. 2-3 years. Seedbank persistence. Medium, 1-5 years. Fire response. Generally survives fire. Prolific flowering and seed set follow summer fire.

Additional information. Origin. Southern Africa. History of use/introduction. Garden escape.

Suggested method of management and control. Wipe individual leaves with glyphosate 10% or spray dense infestations 2,2-DPA 10 g/L + Pulse®. Apply just as flower spikes emerge at corm exhaustion. 2,2-DPA at 5 g/L+ Pulse® is also quite effective and is appropriate to use when particularly concerned about off-target damage, for example following fire when Watsonia is growing among germinating native seedlings and resprouting native shrubs. 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
Dormant Y Y Y                    
Active Growth       Y Y Y Y Y Y Y Y Y  
Flowering                   Y Y    
Germination         Y Y Y            
Optimum Treatment                 Y        

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

 

References

  • Brown, K. (2006) Control of Bulbil Watsonia (Watsonia meriana var. meriana) invading a Banksia Woodland: Effectiveness of 2,2-DPA and its impacts on native flora. Ecological Management and Restoration, 7 (1): 68-70.
  • Brown, K. & Bourke, C. (2014) Wild Native Rose: Untangling the causes of population decline. Australasian Plant Conservation: Journal of the Australian Network for Plant Conservation, 23 (2): 9-11.
  • Brown, K. & Brooks, K. (2002) Bushland Weeds: A Practical Guide to their Management. Environmental Weeds Action Network, Greenwood.
  • Brown, K. & Paczkowska, G. (2013) Plant communities of seasonal clay-based wetlands of south-west Australia: weeds, fire and regeneration. Ecological Management & Restoration, URL: http://site.emrprojectsummaries.org (EMR Project Summaries).
  • Brown, K., Paczkowska, G., Huston, B. & Withnell, N. (2008) Managing Watsonia invasion in the threatened plant communities of south-west Australia’s clay-based wetlands. Australasian Plant Conservation: Journal of the Australian Network for Plant Conservation, 17 (1): 8-10.
  • Du Plessis, N. & Duncan G. (1989) Bulbous plants of Southern Africa. Tafelberg Publishers Ltd, Cape Town, South Africa.
  • Goldblatt, P. (1989) The genus Watsonia. A systematic monograph. Annals of Kirstenbosch Botanic Gardens, 19.
  • 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.
  • Le Maitre, D.C. & Brown, P.J. (1992) Life-cycles and fire stimulated flowering in geophytes. Ecological Studies, 93: 145-160.
  • Manning, J., Goldblatt, P. & Snijman, D. (2002) The color encyclopedia of Cape bulbs. Timber Press, Portland, USA.

Project information and acknowledgements