Gahnia

Gahnia
Gahnia gahniiformis
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
(unranked):	Commelinids
Order:	Poales
Family:	Cyperaceae
Genus:	Gahnia J.R. & G.Forst
Species
See text

Gahnia (sawsedge, saw-sedge) is a genus of sedges found in Australia and a number of Pacific Islands.^[1] The common name is due to the toothed margins.^[1] It often forms tussocks.

Some species

• Gahnia aspera -- Rough Saw-sedge or Round Saw-sedge^[2]
• Gahnia beecheyi -- forest sawsedge^[2]
• Gahnia filum -- chaffy sawsedge^[3]
• Gahnia gahniiformis -- Gaudichaud's sawsedge^[2]
• Gahnia grandis
• Gahnia lanaiensis -- Lanaʻi sawsedge^[2]
• Gahnia melanocarpa -- Black-fruit Saw-sedge
• Gahnia radula -- Thatch Saw-sedge
• Gahnia siberiana -- Red-fruited Saw Sedge
• Gahnia trifida -- Coast Saw-sedge^[4]
• Gahnia vitiensis -- Fijian sawsedge^[2]

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.^[5]

References

1. ^ ^{a b} Darke, Rick (2007). The Encyclopedia of Grasses for Livable Landscapes. Timber Press. pp. 484. ISBN 978-0881928174. 
2. ^ ^{a b c d e} "Gahnia taxonomy and nomenclature". ITIS. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=40335. Retrieved 2008-05-02. 
3. ^ "Cherry Lake and Truganina Swamp". Infostream. Melbourne Water. 2000-11. http://www.melbournewater.com.au/content/library/rivers_and_creeks/wetlands/case_studies/cherry_lake_and_truganina_swamp.pdf. Retrieved 2008-04-02. 
4. ^ "Gahnia trifida Labill.". FloraBase. Department of Environment and Conservation, Government of Western Australia. http://florabase.dec.wa.gov.au/browse/profile/907. 
5. ^ 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.