Fourleaf Allseed

Four-leaved allseed.

Common name

Fourleaf Allseed

Scientific Name

Polycarpon tetraphyllum

Type of plant


About this weed

This widespread weed is found in gardens, limestone areas and Tuart woodlands from Exmouth to Bunbury.  It is a native to Europe and probably introduced with other plants by early settlers.


As an small, hairless annual herb it can have either an erect or spreading or prostrate form. It has dark green ovate leaves and produces inconspicuous flowers in terminal clusters in spring.

Impact on Bushland

Not available.


Found scattered across the Eremaean and South-West Provinces in sandy soils.

Priority for removal

Medium: If left mayspread over bushland and impact on ecological processes and plant communities.

Management (hand)

Not available.

Management (herbicide)

Not available.

Flowering month/s

January, July, September, October, November, December

Flower colour/s

Green, Red, White

Information source

Additional information

Hussey, B.M.J., Keighery, G.J., Dodd, J., Lloyd, S.G. and Cousens, R.D. (2007) Western weeds. A guide to the weeds of Western Australia, Second Edition, The Weeds Society of Western Australia, Victoria Park, Western Australia.

Fourleaf Allseed images


Donations and support from the wider community help us to protect and campaign for our Urban Bushland.

Make a donation

newsletter Signup

Get the latest news and key events delivered to your inbox.

Become a Member

We are a peak environmental group in WA. One of our key strengths is our amazing group and individual members.

Become member

Urban Bushland Council WA Inc

2 Delhi Street West Perth WA 6005

PO Box 326 West Perth WA 6872

(08) 9420 7207 (please leave a message)