Willd., Juncaceae |
Present on Pacific Islands? yes
Primarily a threat at high elevations? no
Common name(s): [more details]
Chinese: jian bei deng xin cao |
English: field rush, path rush, slender rush, slender yard rush, soft rush, wiregrass |
French: jonc grêle |
Habit: rush
Description: "Perennial herbs; stems 1-6 dm long, 1-2 mm in diameter, loosely cespitose. Leaves basal, numerous and crowded, blades variable in length, 7-30 cm long, 1-1.3 mm wide, sheaths loose with wide hyaline margins prolonged into white scarious auricles up to 5 mm long. Flowers (3-) numerous, borne singly on 1 side of rachis, in relatively compact dichasial cymes 1-7 cm long, forming less than 1/3 of plant, bracts 2-3, foliaceous, usually far exceeding inflorescence, each flower subtended by 2 bracteoles, these hyaline, triangular-ovate; perianth parts greenish, lanceolate, 3-4.5 mm long, apex long-acuminate, outer ones slightly reflexed at apex, inner ones with wide hyaline margins below; stamens 6, 1/2 as long as perianth; anthers shorter than filaments. Capsules reddish brown, 1-celled, broadly ovoid, thin-walled, slightly beaked, 2/3 to rarely scarcely shorter than perianth. Seeds pale brown, oblong, 0.3-0.4 mm long, slightly apiculate at both ends" (Wagner et al., 1999; p. 1454).
Habitat/ecology: In Hawaii, "naturalized in usually wet sites along trails, disturbed places, and pastures, 700-2,000 m" (Wagner et al., 1999; p. 1454).
Propagation: Seed
Native range: North and South America; naturalized elsewhere (GRIN).
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 |
Hawaii (Big) Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1454) |
State of Hawaii
Hawaiian Islands |
Kauai Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1454) |
State of Hawaii
Hawaiian Islands |
Maui Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1454)
East Maui |
State of Hawaii
Hawaiian Islands |
Molokai Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1454) |
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 |
introduced
invasive |
National Herbarium of New South Wales (2013)
Naturalized, scattered, mostly near towns and other areas of human disturbance. |
Australia
Australia (continental) |
Australia (continental) |
introduced
invasive |
National Herbarium of New South Wales (2013)
Tasmania, Victoria Naturalised |
British Columbia (province of Canada)
Province of British Columbia |
Canada (British Columbia) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
Central America
Central America (Pacific rim) |
Costa Rica (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
Central America
Central America (Pacific rim) |
El Salvador (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
Central America
Central America (Pacific rim) |
Guatemala (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
Central America
Central America (Pacific rim) |
Honduras (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
China
China |
China (People's Republic of) |
introduced
invasive |
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Riversides, streamsides, wet grasslands; ca. 400 m. Heilongjiang, Henan, Jiangxi, Shandong, Zhejiang. |
Japan
Japan |
Japan |
introduced
invasive |
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized |
Japan
Japan |
Japan |
introduced
|
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 191)
var. anthelatus Wiegand and var. nakaii Satake |
North Korea
North Korea |
North Korea (Democratic People's Republic of) | Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) | |
South Korea
South Korea |
South Korea (Republic of) | Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013) | |
Mexico
Mexico |
Mexico (United Mexican States) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Chiapas, Coahuila, Guerrero, Hidalgo, Mexico, Oaxaca, Veracruz |
New Zealand
New Zealand |
New Zealand (country) |
introduced
invasive |
Healy, A. J./Edgar, E. (1980) (pp. 92-93)
"Widely occurring, occasional to locally abundant in dry to damp sites, sea-level to over 1000 m". |
South America (Pacific rim)
South America (Pacific rim) |
Colombia |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
South America (Pacific rim)
South America (Pacific rim) |
Ecuador (Republic of) (continental) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
South America (Pacific rim)
South America (Pacific rim) |
Perú (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
Taiwan
Taiwan Island |
Taiwan Island |
introduced
invasive |
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Riversides, streamsides, wet grasslands; ca. 400 m. |
United States (west coast)
United States (west coast states) |
USA (Oregon) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
United States (west coast)
United States (west coast states) |
USA (California) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
United States (west coast)
United States (west coast states) |
USA (Washington) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
Indian Ocean | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
Mauritius
Mautitius Islands (Mauritius and Rodrigues) |
Mauritius Island |
introduced
invasive |
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Naturalized |
Also reported from | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
Canada
Canada |
Canada |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
United States (continental except west coast)
United States (other states) |
United States (other states) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
United States (continental except west coast)
United States (other states) |
USA (Florida) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
Control: If you know of control methods for Juncus tenuis, please let us know.