Kunth, Poaceae |
Present on Pacific Islands? yes
Primarily a threat at high elevations? no
Common name(s): [more details]
English: ditch beard grass, ditch polypogon, ditch rabbitsfoot grass |
Habit: grass
Description: "Perennials; culms tufted, 0.5-6 (-9) dm tall, sometimes decumbent at base and rooting at nodes. Sheaths smooth to scaberulous, margins overlapping, thin; ligule translucent, firm, (1.5-) 3-7 (-9.5) mm long, nerved, puberulent, margins entire to lacerate, apex narrowed, obtuse, or truncate; blades flat, 2-5 (-9) mm wide, scabrous. Panicles 2-9 (-15) cm long, interrupted, branches erect; glumes subequal, 1.7-2.5 mm long, keeled, hispidulous, apex narrowed abruptly into a terminal awn, sometimes minutely bifid, the awn (1-) 1.5-3 (-5) mm long; lemma narrowly lanceolate, (0.7-) 1-1.5 mm long, smooth, glossy, apex minutely bifid, awned from near apex, the awn ca. 3 mm long; palea similar and nearly as long as lemma. Caryopsis pale brown, narrowly ovoid, 0.6-0.8 mm long" (Wagner et al., 1999; p. 1585-1586).
Description and other information from World Grass Species database.
Habitat/ecology: In Hawaii, "naturalized and common in wet sites such as along streams, roadside drainages, in wet forest, and near rock seeps, 0-1,980 m" (Wagner et al., 1999; p. 1585).
Propagation: Seed
Native range: Western and southern 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. 1586) |
State of Hawaii
Hawaiian Islands |
Kauai Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1586) |
State of Hawaii
Hawaiian Islands |
Kure Atoll |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R. (1995) (p. 24)
Voucher cited: Saito s.n. (BISH) |
State of Hawaii
Hawaiian Islands |
Kure Atoll |
introduced
invasive |
Starr, Forest/Martz, Kim/Loope, Lloyd (2001) (p. 16)
Common near quarters, on the runway, and in open areas. |
State of Hawaii
Hawaiian Islands |
Maui Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1586)
Voucher cited: Forbes 171.M (BISH) |
State of Hawaii
Hawaiian Islands |
Oahu Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1586) |
United States (other Pacific offshore islands)
Midway Atoll |
Midway Atoll |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1586) |
United States (other Pacific offshore islands)
Midway Atoll |
Sand Island |
introduced
invasive |
Starr, Forest/Starr, Kim/Loope, Lloyd (2008) (pp. B-12) |
Pacific Rim | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
South America (Pacific rim)
South America (Pacific rim) |
Chile (Republic of) |
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) |
United States (west coast)
United States (west coast states) |
USA (Oregon) |
native
|
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013) |
United States (west coast)
United States (west coast states) |
USA (California) |
native
|
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013) |
United States (west coast)
United States (west coast states) |
USA (Washington) |
native
|
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013) |
Also reported from | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
United States (continental except west coast)
United States (other states) |
United States (other states) |
native
|
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013) |
Control: If you know of control methods for Polypogon interruptus, please let us know.