Pacific Pests, Pathogens, Weeds & Pesticides - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Crepe ginger (549)


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Summary

  • Widespread distribution. In Australia, and a majority of Pacific island countries. Environmental weed, tolerates shade, fast growing, forming thickets along roadsides, on waste ground, in disturbed and secondary forests, displacing native species in tropical and subtropics. Considered "an ecosystem transformer".
  • Stem, erct or spreading, to 3 m, woody at base, spirally twisting with age. Leaves, alternate, shiny, hairy below. Flowers, terminal, with three white fused petals forming a tube around large trumpet-shaped structure (labellum) with crinkling at opening. Fruits, red/green containing black, glossy seeds. 
  • Spread: seeds by birds, rodents, shoes, machinery; and rhizomes. Long distances, international trade for ornamental and medicinal purposes.
  • Biosecurity: high risk. Valued for ornamental and medicinal uses. Readily available on Internet.
  • Biocontrol: none.
  • Cultural: hand-pulling; collect stem pieces and burn. Probably, repeated applications necessary.
  • Chemical: In FSM, triclopyr. Leaf spray and cut stump/paint treatments (see Fact Sheet no. 546).

Common Name

Crepe ginger. It is also known as spiral ginger, or variegated ginger.

Scientific Name

Hellenia speciosa. Previously, it was Costus speciosus and Cheilocostus speciosus. It is a member of the Zingiberaceae.


AUTHOR Konrad Englberger & Grahame Jackson
Information from CABI (2016) Cheilocostus speciosus (crepe ginger). Crop Protection Compendium. (https://www.cabidigitallibrary.org/doi/10.1079/cabicompendium.110397). and Cheilocostus speciosus (J.Koenig) C.D. Specht, Coastaceae. (http://www.hear.org/PIER/species/cheilocostus_speciosus.htm); and from Hellenia speciosa (J.Koenig) S.R Dutta. Royal Botanic Gardens Kew. Plants of the World Online. (https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:60469691-2). Photo 3 Gerald McCormack, Cook Islands Biodiversity Database, Version 2007.2. Cook Islands Natural Heritage Trust, Rarotonga. (http://cookislands.bishopmuseum.org/). Photo 4 Joy Viola, Northeastern University, Bugwood.org. Photo 5 Sekh Sayantan, Burdwan Eco Garden, Bugwood.org.

Produced with support from the Australian Centre for International Agricultural Research under project HORT/2016/185: Responding to emerging pest and disease threats to horticulture in the Pacific islands, implemented by the University of Queensland and the Secretariat of the Pacific.

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