Gahnia

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Gahnia
Starr 031001-0122 Morelotia gahniiformis.jpg
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Cyperaceae
Genus: Gahnia
J.R. & G.Forst
Synonyms[1]
  • Lampocarya R.Br.
  • Epiandria C.Presl
  • Didymonema C.Presl
  • Melachne Schrad. ex Schult. & Schult.f. in J.J.Roemer & J.A.Schultes
  • Psittacoschoenus Nees in J.G.C.Lehmann

Gahnia (sawsedge, saw-sedge) is a genus of sedges native to China, Southeast Asia, New Guinea, Australia, New Zealand and a number of Pacific Islands.[1][2][3][4] The common name is due to the toothed margins.[4] It often forms tussocks.

Species[]

Accepted species:[1]

  • Benth. – Western Australia, South Australia, Victoria
  • Benth. – Western Australia
  • Gahnia aspera (R.Br.) Spreng. – Maluku, New Guinea, Queensland, New South Wales, Melanesia, Bonin Islands, Hawaii
  • (Nees) K.L.Wilson – Western Australia
  • Benl. – Fujian, Guangdong, Guangxi, Hainan, Vietnam, Borneo, Malaysia, Sumatra
  • H.Mann – forest sawsedge – Hawaii
  • Gahnia clarkei Benl – New Guinea, New South Wales, Queensland, Victoria
  • (R.Br.) Benth. – Western Australia
  • (R.Br.) Benth. – Western Australia, South Australia, Victoria
  • (Steud.) K.L.Wilson – Western Australia
  • Gahnia erythrocarpa R.Br. – New South Wales
  • (C.Presl) Kük. ex Benl – New South Wales
  • Gahnia filum (Labill.) F.Muell.— chaffy sawsedge – Australia, all states except Queensland[5]
  • Rodway – Tasmania
  • Gahnia grandis (Labill.) S.T.Blake – Queensland, New South Wales, Victoria
  • R.L.Barrett & K.L.Wilson – South Australia
  • Gahnia howeana R.O.Gardner – Lord Howe Island
  • J.M.Black – Kangaroo Island
  • S.T.Blake – Queensland, New South Wales
  • Moritzi – Yunnan, Vietnam, Malaysia, Borneo, Java, Sumatra, Sulawesi, Philippines, New Guinea, Solomon Islands
  • (R.Lesson ex A.Rich.) Steud. – Cutty grass – New Zealand North Island
  • O.Deg., I.Deg. & J.Kern -- Lanaʻi sawsedge – Lanaʻi Island of Hawai'i
  • Gahnia lanigera (R.Br.) Benth. – Western Australia, South Australia, Victoria, New South Wales
  • F.Br. – Marquesas
  • Gahnia melanocarpa R.Br. – Black-fruit saw-sedge – Queensland, New South Wales, Victoria
  • Guillaumin – New Caledonia
  • Benth. – Victoria, New South Wales, Tasmania
  • Benl – New Caledonia
  • Gahnia pauciflora Kirk – Cutting sedge – New Zealand North and South Islands
  • J.R.Forst. & G.Forst. – Mountain sedge – New Zealand North and South Islands
  • Gahnia radula (R.Br.) Benth. – Thatch saw-sedge – Victoria, New South Wales, Tasmania, South Australia
  • Kirk – New Zealand North and South Islands
  • G.Forst. – Society Islands
  • K.L.Wilson – Western Australia
  • Gahnia setifolia Hook.f. – Māpere, razor sedge – New Zealand North and South Islands
  • Gahnia sieberiana Kunth – Red-fruited saw sedge – Australia, New Guinea, Sulawesi, Solomon Islands, New Caledonia
  • J.Raynal – New Caledonia
  • S.T.Blake – Queensland, New South Wales, Victoria
  • Gahnia trifida Labill. – Coast saw-sedge – Victoria, South Australia, Tasmania, Western Australia[6]
  • Nees in W.J.Hooker & G.A.W.Arnott – China, Ryukyu Islands, Thailand, Vietnam, Borneo, Malaysia, Sumatra
  • Rendle -- Fijian sawsedge – Fiji, Hawaii
  • (Hook.f.) Hook.f. – 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 introduced from New Zealand in the early 20th century.[7]

References[]

  1. ^ a b c Kew World Checklist of Selected Plant Families
  2. ^ Flora of China, Vol. 23 Page 257, 黑莎草属 hei suo cao shu, Gahnia J. R. Forster & G. Forster, Char. Gen. Pl. 26. 1775.
  3. ^ Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.
  4. ^ a b Darke, Rick (2007). The Encyclopedia of Grasses for Livable Landscapes. Timber Press. p. 484. ISBN 978-0-88192-817-4.
  5. ^ "Cherry Lake and Truganina Swamp" (PDF). Infostream. Melbourne Water. November 2000. Archived from the original (PDF) on 2008-07-22. Retrieved 2008-04-02.
  6. ^ "Gahnia trifida Labill". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  7. ^ Koyama, T. (2010). On the identity of Gahnia lanaiensis O. Deg., I. Deg. & J. Kern (Cyperaceae) of Hawai‘i. Records of the Hawaii Biological Survey for 2008 Evenhuis, N. L. and L. G. Eldredge, Eds. Bishop Museum Occasional Papers 107: 29–32.
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