Pacific Island Ecosystems at Risk (PIER)

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Schoenoplectus juncoides
(dummy value for TaxonCode Authority; this value should be replaced!!).......Cyperaceae


Scirpus juncoides Roxb.

Chinese: ying lin

English: bulrush, hardstem bullrush

"Tufted in clumps, without a conspicuous rhizome; culms 15-70 cm tall, 1-4 mm thick, subterete or obtusely several-angled, light green, dull, clothed at base with few sheaths only; sheaths 3 or 4, the lower ones scale-like, brownish, the upper ones 5-15 cm long, pale green, obliquely truncate at mucronate orifice; inflorescence a pseudolateral head with (1-) 2-9 (-12) spikelets; bract 5-15 cm long, rather suddenly subacute at apex, 1-furrowed on ventral side, dilated at base; spikelets oblong to ovoid-oblong, 6-18 mm long, 3-6 mm broad, straw-colored, rather suddenly contracted to subobtuse apex, densely many-flowered; glumes oval to ovate-oval, 3-4 mm long, 1.8-2.7 mm broad, thickly membranous, pale and brown-tinged, the apex rounded to shallowly emarginate and mucronate, the keel broad, green, 1- or 3-nerved; achenes broadly obovate, unequally biconvex, 1.8-2 mm long, about 1.5 mm broad, suddenly contracted to cuneate base, rounded to mucronate apex, the sides maturing dark brown, shiny, transversely wrinkled; style 2-2.2 mm long, somewhat flattened; stigmas 2, but occasionally with a rudimentary third one; hypogynous bristles 4-6, retrorsely scabrous except for base, 4 as long as or slightly surpassing the achene, the others half as long as the achene or shorter" (Smith, 1979; pp. 236-237). In Hawai‘i, "occurring in and around bogs, pond margins, and in wet forest, (5-) 180-1,370 m" (Wagner et al., 1999; p. 1432). In Fiji, "occurs in swamps and open places, along roadsides, and especially in rice fields, at elevations of sea level to 150 m" (Smith, 1979; pp. 236-237). Seed "Occurring in wet sites, often in rice fields, from Japan south to Malesia and India, disjunct in Hawai‘i and Fiji" (Wagner et al., 1999; p. 1432). "From India through southeastern Asia and Japan into Malesia and northern Australia, occurring as an adventive in other parts of the Pacific" (Smith, 1979; pp. 236-237).
Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Fiji
Fiji Islands
Vanua Levu Island introduced
invasive
Smith, Albert C. (1979) (pp. 236-237)
Vouchers cited: DA 8785, DA 10459
Fiji
Fiji Islands
Viti Levu Island introduced
invasive
Smith, Albert C. (1979) (pp. 236-237)
Vouchers cited: Greenwood 980, DA 11440, DA 2851, DA 9443, Smith 8850, DA 11827, DA 10574, DA 11000, DA 8591
Guam
Guam Island
Guam Island native
Stone, Benjamin C. (1970) (p. 178)
Rare--only found once.
Guam
Guam Island
Guam Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 78)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island native
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1432-1433)
Voucher cited: Stemmermann 6694
State of Hawaii
Hawaiian Islands
Kaua‘i Island native
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1432-1433)
Palau
Palau (Belau ) (main island group)
Babeldaob Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 78)
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)
Australia (continental)   Hafliger, E. (1092) (p. 63)
Cambodia
Cambodia
Cambodia (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
China (People's Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
North Korea
North Korea
North Korea (Democratic People's Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Korea
South Korea
South Korea (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Malaysia
Malaysia
Malaysia (country of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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)
Reported as possibly an invasive plant in southeast Asia (Barbara Waterhouse, pers. com.).


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