Gahnia

Location & distribution maps

Phylogeny & links to associated information:

Wikipedia links:      Angiosperms  > Monocots >  Poales > Cyperaceae > Gahnia 

Other links:

Plant  information

Common name:                Saw-sedge  

• Sawsedge or saw-sedge

• The common name is due to the toothed margins

Conservation status:  . . .

Etymology:   

Flowers:                  

Fruit:                         

Leaves:         

Stem & branches: 

Roots:         

Habit:        

Habitat:   

• It often forms tussocks

Distribution:                  

• Gahnia is a genus of sedges native to China, Southeast Asia, New Guinea, Australia, New Zealand and a number of Pacific Islands

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Species:                     

• World:           42

• Australia:     25

Additional notes:     

• Species

• Accepted species:

  • • • 1. Gahnia ancistrophylla – Western Australia, South Australia, Victoria

        2. Gahnia aristata – Western Australia

        3. Gahnia aspera – Maluku, New Guinea, Queensland, NSW, Melanesia, Bonin Islands, Hawaii

        4. Gahnia australis (Nees) K.L.Wilson – Western Australia

        5. Gahnia baniensis – Fujian, Guangdong, Guangxi, Hainan, Vietnam, Borneo, Malaysia, Sumatra

        6. Gahnia beecheyi – forest sawsedge – Hawaii

        7. Gahnia clarkei – New Guinea, New South Wales, Queensland, Victoria

        8. Gahnia decomposita – Western Australia

        9. Gahnia deusta – Western Australia, South Australia, Victoria

        10. Gahnia drummondii – Western Australia

        11. Gahnia erythrocarpa – New South Wales

        12. Gahnia filifolia – New South Wales

        13. Gahnia filum — chaffy sawsedge – Australia, all states except Queensland

        14. Gahnia graminifolia – Tasmania

        15. Gahnia grandis – Queensland, New South Wales, Victoria

        16. Gahnia halmaturina – South Australia

        17. Gahnia howeana – Lord Howe Island

        18. Gahnia hystrix – Kangaroo Island

        19. Gahnia insignis – Queensland, New South Wales

        20. Gahnia javanica Moritzi – Yunnan, Vietnam, Malaysia, Borneo, Java, Sumatra, Sulawesi, Philippines, New Guinea, Solomon Islands

        21. Gahnia lacera – Cutty grass – New Zealand North Island

        22. Gahnia lanaiensis - Lanaʻi sawsedge – Lanaʻi Island of Hawai'i

        23. Gahnia lanigera – Western Australia, South Australia, Victoria, New South Wales

        24. Gahnia marquisensis – Marquesas

        25. Gahnia melanocarpa – Black-fruit saw-sedge – Queensland, New South Wales, Victoria

        26. Gahnia microcarpa – New Caledonia

        27. Gahnia microstachya – Victoria, New South Wales, Tasmania

        28. Gahnia novocaledonensis – New Caledonia

        29. Gahnia pauciflora – Cutting sedge – New Zealand North and South Islands

        30. Gahnia procera – Mountain sedge – New Zealand North and South Islands

        31. Gahnia radula – Thatch saw-sedge – Victoria, New South Wales, Tasmania, South Australia

        32. Gahnia rigida – New Zealand North and South Islands

        33. Gahnia schoenoides – Society Islands

        34. Gahnia sclerioides – Western Australia

        35. Gahnia setifolia – Māpere, razor sedge – New Zealand North and South Islands

        36. Gahnia sieberiana – Red-fruited saw sedge – Australia, New Guinea, Sulawesi, Solomon Islands, New Caledonia

        37. Gahnia sinuosa – New Caledonia

        38. Gahnia subaequiglumis – Queensland, New South Wales, Victoria

        39. Gahnia trifida – Coast saw-sedge – Victoria, South Australia, Tasmania, Western Australia

        40. Gahnia tristis – China, Ryukyu Islands, Thailand, Vietnam, Borneo, Malaysia, Sumatra

        41. Gahnia vitiensis - Fijian sawsedge – Fiji, Hawaii

        42. Gahnia xanthocarpa – Māpere, gahnia – New Zealand North and South Islands

• Conservation

  • The species Gahnia lanaiensis has been known as a rare endemic plant from the Hawaiian island of Lanai and it was federally listed as an endangered species of the United States

  • In 2010, however, research suggested that the Lanai plants are actually Gahnia lacera introduced from New Zealand in the early 20th century

Sources of information:

• https://en.wikipedia.org/wiki/Gahnia (2023)