Bipinnate Beggar's Ticks (species: Bidens bipinnata) in taxonomy (Lizard Island Field Guide)
Bidens bipinnata
Bipinnate Beggar's Ticks

©Anne Hoggett: Bidens bipinnata in flower at Lizard Island Research Station, Mar 2018. Plants up to 1 metre high.

©Anne Hoggett: Flower of Bidens bipinnata at Lizard Island Research Station, Mar 2018.

©Anne Hoggett: Seed head of Bidens bipinnata at Lizard Island Research Station, Apr 2018.
Kingdom Plantae
Division Charophyta
Class Equisetopsida
Order Asterales
Family Asteraceae
Genus Bidens
Species Bidens bipinnata



Distinguishing features

Two introduced species of Bidens have been reported from Lizard Island, Bidens bipinnata and Bidens pilosa (Colvill, 2004). They have similar flowers and "seeds" (really achenes) but the leaves are different (Brisbane City Council Weed Identification Tool, link below). Bidens bipinnata has leaves that are greatly divided (i.e. pinnatifid) while those of Bidens pilosa are toothed but not divided.

The highly pinnate species is the common one at Lizard Island and it's possible that the record of Bidens pilosa on the island is incorrect.

A native species with a similar achene, Glossocardia bidens, has also been recorded on Lizard Island. It has a different habit and leaf shape.


  • Size data has not been obtained.



©Atlas of Living Australia: Australian distribution

Web resources


  • Byrnes, N.B., S.L. Everist, S.T. Reynolds, A. Specht and R.L. Specht (1977). The vegetation of Lizard Island, North Queensland, Proceedings of the Royal Society of Queensland, 88: 1-15. LIRS catalog number 3.
  • Colvill, A., M. Ahmet, S. Clag and B. Haigh (2004). Lizard Island fauna and flora sampling report.Queensland Parks and Wildlife Service. LIRS catalog number 10067.
  • De Sloover, J.R. and A.-L. Jacquemart (2008). Nymph Island (Great Barrier Reef, Qld., Australia): Flora and vegetation of a low wooded island, Scripta Botanica Belgica, 43: 1-88. LIRS catalog number 1210.