Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Scirpus aestivalis Retz.

Common name(s): [more details]

Chinese: xia piao fu cao

English: summer fimbry

French: fimbristylis d'été

Habit:  sedge

Description:  "Small annuals with fibrous roots; culms tufted, 3-12 cm tall, 0.3-0.5 mm in diameter.  Leaves few, blades linear-filiform, much shorter than the culm, 0.4-1 mm wide, glabrate to sparsely pilose, apex gradually acuminate; sheaths pale to yellowish brown, 5-15 mm long, usually pubescent; ligule absent.  Inflorescences compound, lax, 2-4 cm long and wide, rays 3-7, filiform, 0.5-2.7 cm long, each one terminated by a single spikelet; involucral bracts 2-3, shorter than inflorescence, pilose or glabrate; spikelets 8-15-flowered, ovoid to narrowly ovoid, 2.5-5 mm long, 1-1.5 mm wide, subacute; glumes yellowish brown, membranous, ovate, 1-1.2 mm long, the keel green, apex mucronulate; style filiform, glabrous at base, occasionally ciliolate below stigmas; stigmas 2.  Achenes yellow, obovoid, biconvex, 0.6-0.7 mm long, faintly cancellate, apex rounded, base short-stipitate"  (Wagner et al., 1999; p. 1404).

Habitat/ecology:  In Hawai‘i, "apparently only sparingly naturalized and known from 2 collections from ca. 3 m in taro paddies...and one collection from a pond"  (Wagner et al., 1999; p. 1404).

Propagation:  Seed

Native range:  "Native from Japan and China south to India, Malesia, and Australia" (Wagner et al., 1999; p. 1404).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive	Oppenheimer, Hank L./Bartlett, Randal T. (2002) (p. 7) Voucher cited: Oppenheimer H40020 (BISH)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1404) Voucher cited: Herbst 5953 (BISH)
New Caledonia New Caledonia	New Caledonia Islands	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Papua New Guinea Papua New Guinea (eastern New Guinea Island)	Papua New Guinea (eastern New Guinea Island)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines Philippine Islands	Philippine Islands	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia Australia (continental)	New South Wales	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia Australia (continental)	Australia (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013) South Australia, Victoria
Australia Australia (continental)	Northern Territory	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia Australia (continental)	Queensland	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
China China	China (People's Republic of)	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) Grasslands, marshy places, paddy fields; 400-2200 m. Anhui, S Chongqing, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Heilongjiang, Hubei, Hunan, Jiangxi, S Shaanxi, Sichuan, S Yunnan, Zhejiang.
China China	Hong Kong	native	Wu, Te-lin (2001) (p. 313) In marshes, paddy fields and other wet places.
Indonesia Indonesia	Indonesia (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan Japan	Japan	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Malaysia Malaysia	Malaysia (country of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Taiwan Taiwan Island	Taiwan Island	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) Grasslands, marshy places, paddy fields; 400-2200 m.
Thailand Thailand	Thailand (Kingdom of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam Vietnam	Vietnam (Socialist Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)

Control:  If you know of control methods for Fimbristylis aestivalis, please let us know.