Parentucellia viscosa (L.) Caruel Sticky Bartsia
Parl., Fl.Ital. 6:482-483 (1885)

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

Brief Description
Amanda Spooner, Monday 13 August 2007

Erect, viscid annual or biennial (rarely), herb, (0.05-)0.1-0.7 m high. Fl. yellow, Aug to Dec or Feb. Sandy, clay or lateritic soils. Swampy areas, granite outcrops.


Beard’s Provinces: South-West Province.

IBRA Regions: Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain, Warren.

IBRA Subregions: Dandaragan Plateau, Lesueur Sandplain, Northern Jarrah Forest, Perth, Southern Jarrah Forest, Warren.

IMCRA Regions: Leeuwin-Naturaliste, WA South Coast.

Local Government Areas (LGAs): Albany, Armadale, Augusta-Margaret River, Boyup Brook, Bridgetown-Greenbushes, Bunbury, Busselton, Canning, Capel, Chittering, Cockburn, Collie, Cranbrook, Dandaragan, Denmark, Donnybrook-Balingup, Gingin, Gosnells, Harvey, Kwinana, Mandurah, Manjimup, Murray, Nannup, Plantagenet, Rockingham, Serpentine-Jarrahdale, Swan, Wanneroo, Waroona, West Arthur, York.

Management Notes (for the Swan NRM Region)
Kate Brown and Karen Bettink, Monday 18 July 2016

Alternative Names. Yellow Bartsia, Yellow Glandweed, Sticky Parentucellia.

General Biology. Growth form. Herb. Life form. Annual. Reproduction. Seed. Dispersal. Wind, water machinery, clothing. Seedbank persistence. At least one year.

Notes. Hemiparasitic on the roots of other plants, but can germinate and grow without hosts. Able to colonise a wide range of hosts. Produces numerous small seeds. Seed heads adhere to clothing.

Additional information. Origin. Mediterranean region, western Europe. Similar exotic species. Bartsia trixago, Parentucellia latifolia.

Suggested method of management and control. Remove isolated plants manually before flowering. Try spot spraying with glyphosate 0.5% before flowering. 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 TypeJanFebMarAprMayJunJulAugSepOctNovDecComments
Germination    YYYYYYY  
Active GrowthY    YYYYYYY 
FloweringY      YYYYY 
FruitingU        UUU 
Manual Removal     YYOOO   
Herbicide Treatment     YYOO    

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



  • Brown, K. & Brooks, K. (2002) Bushland Weeds: A Practical Guide to their Management. Environmental Weeds Action Network, Greenwood.
  • Brusati, E. & Corelli, T. (2003) California Invasive Plant Inventory Assessment Form: Parentucellia viscosa. California Invasive Plant Council URL: - Accessed May 2010.
  • Emerzian, V.K. (2007) Radiant heater effects on Leontodon taraxacoides, Hypochaeris glabra, and Parentucellia viscosa in dunes and seasonal swales at Humboldt Bay National Wildlife Refuge. Humboldt State University, Natural Resources: Planning URL: - Accessed May 2010.
  • 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.
  • Pate, J.S. & Bell, T.L. (2000) Host associations of the introduced annual root hemiparasitic Parentucellia viscosa in agricultural and bushland settings in Western Australia. Annals of Botany, 85: 203-213.

Project information and acknowledgements