Oxalis flava L. Pinkbulb Soursob
Sp.Pl. 1:433 (1753)

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

Brief Description
Grazyna Paczkowska, Monday 12 August 1996

Bulbaceous and rhizomatous, perennial, herb. Fl. yellow, May. Roadsides.

Distribution

Beard’s Provinces: South-West Province.

IBRA Regions: Avon Wheatbelt, Jarrah Forest.

IBRA Subregions: Avon Wheatbelt P2, Northern Jarrah Forest, Southern Jarrah Forest.

Local Government Areas (LGAs): Donnybrook-Balingup, Northam, Williams, York.

Management Notes (for the Swan NRM Region)
Kate Brown and Karen Bettink, Monday 26 August 2019

General Biology. Growth form. Geophyte. Life form. Annually renewed bulb. Reproduction. Bulbils. Dispersal. Soil. Fire response. Generally survives fire.

Notes. Not known to set seed in Australia.

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

Suggested method of management and control. Spot spray metsulfuron methyl 0.2 g/15 L + Pulse®, or 1% glyphosate. Apply at bulb exhaustion, generally just on flowering. Exercise care if manually removing as physical removal can result in spread of bulbils. 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 O                 Y  
Active Growth       Y Y Y Y Y Y O U    
Flowering         Y                
Optimum Treatment         Y                

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

 

References

  • Brooks, K. (2001) Managing weeds in bushland: Soursob, Fingerleaf and Four oclock (Oxalis pes-caprae, O.glabra and O.purpurea). Environmental Weeds Action Network URL: http://www.environmentalweedsactionnetwork.org.au/ - Accessed December 2007.
  • Brown, K. & Brooks, K. (2002) Bushland Weeds: A Practical Guide to their Management. Environmental Weeds Action Network, Greenwood.
  • Harden, G.J. (ed.) (1990-93) Flora of New South Wales Vols. 1 to 4. New South Wales University Press, Kensington.
  • 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.

Project information and acknowledgements