Pacific Island Ecosystems at Risk (PIER)

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Urochloa reptans
(L.) Stapf, Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Brachiaria reptans (L.) C. A. Gardner & C. E. Hubb.; Panicum reptans L.

Common name(s): [more details]

Chinese: wei fu cao

English: cent per cent, creeping panic grass, running grass, sprawling signal grass

French: chiendent blanc, herbe à Bengali, herbe à Bengalis, herbe couresce batarde

Spanish: San Juan de Castillo, tiende suelo

Habit:  grass

Description:  "Annual and semiprostrate, the culms spreading; leaf blades lanceolate, 1.8-3.7 cm long, 3-9 mm broad; flowering culms bearing 3-15 racemes, these spreading to slightly ascending, with long white hairs on axis and pedicels" (Smith, 1979; pp. 331-332).

"Habit: Annual. Culms decumbent; 15-60 cm long; rooting from lower nodes. Ligule a fringe of hairs. Leaf-blades lanceolate; 2-8 cm long; 3-15 mm wide. Inflorescence: Inflorescence composed of racemes. Racemes 5-15; borne along a central axis; unilateral; 1-4 cm long. Central inflorescence axis 1-8 cm long. Rhachis wingless; angular. Spikelet packing crowded; regular; 2 -rowed. Spikelets in pairs. Fertile spikelets sessile and pedicelled. Pedicels ciliate. Fertile spikelets: Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or oblong; dorsally compressed; compressed slightly; acute; 1.5-2.2 mm long; falling entire. Glumes: Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume orbicular; clasping; 0.15-0.25 times length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex truncate. Upper glume ovate; 1 times length of spikelet; membranous; without keels; 7-veined. Upper glume apex acute. Florets: Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 times length of spikelet; membranous; 5-veined; acute. Fertile lemma elliptic; 1-2 mm long; indurate; without keel. Lemma surface rugose. Lemma margins involute. Lemma apex acute; mucronate. Palea involute; indurate; without keels" (GrassBase).

Habitat/ecology:  In Fiji, "a moderately common weed of sugarcane fields, roadsides, open grasslands, and the seashore, reported from elevations between sea level and about 800 m" (Smith, 1979; pp. 331-332).  "Occasional in waste places and lawns" (Whistler, 1988; p. 47). In Guam, "in cultivated ground or lawns" (Stone, 1970; p. 203). In New Guinea, "a weed of roadsides, gardens and annual field crops, often invading heavily-grazed pastures and hindering the re-establishment of better grasses" (Henty & Pritchard, 1975; p. 34). In New Caledonia, "largement répandu sur la Grande-Terre, Nord et Sud. Parfois en pâturage (noté comme bon fourrage); commun aussi comme mauvaise herbe des jardins, cultures et terrains vagues" (MacKee, 1994; p. 57).

Propagation:  Seed

Native range:  Pantropical

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Agrigan (Agrihan) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 52)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Aguijan (Agiguan, Aguihan) Island native
Raulerson, L. (2006) (p. 10)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Guguan Island native
Raulerson, L. (2006) (p. 10)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Maug Island native
Raulerson, L. (2006) (p. 10)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Saipan Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 52)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Tinian Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 52)
Cook Islands
Southern Cook Islands
Rarotonga Island   McCormack, Gerald (2013)
Federated States of Micronesia
Yap Islands
Yap (Waqab) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 52)
Fiji
Fiji Islands
Thithia Island introduced
invasive
Smith, Albert C. (1979) (pp. 331-332)
Voucher cited: DA 13250
Fiji
Fiji Islands
Vanua Levu Island introduced
invasive
Smith, Albert C. (1979) (pp. 331-332)
Vouchers cited: DA 8768, DA 8834
Fiji
Fiji Islands
Viti Levu Island introduced
invasive
Smith, Albert C. (1979) (pp. 331-332)
Vouchers cited: Greenwood 328, 414B; DA 8217; DA 8794; Degener 14959; DA 2352; DA 8568; DA 7815; DA 7910; DA 7171
French Polynesia
French Polynesia Islands
French Polynesia Islands   Waterhouse, D. F. (1997) (p. 66)
French Polynesia
Marquesas Islands
Eiao Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Eiao Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence & M. Teikiteetini 9323 (PAP)
Adventice
French Polynesia
Marquesas Islands
Fatu Hiva Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Fatu Hiva Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Marquesas Islands
Fatu Hiva Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1995) (voucher ID: PTBG 21358)
Taxon name on voucher: Urochloa reptans (L.) C.A. Gardner & C.E. Hubb
French Polynesia
Marquesas Islands
Hatuta'a (Hatutu) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Hatuta'a (Hatutu) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence & M. Teikiteetini 9389 (PAP), S.P. Perlman 10067 (PAP)
Adventice
French Polynesia
Marquesas Islands
Hatuta'a (Hatutu) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1988) (voucher ID: PTBG 8299)
Taxon name on voucher: Urochloa reptans
French Polynesia
Marquesas Islands
Hiva Oa Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Hiva Oa Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Marquesas Islands
Mohotani (Mohotane, Mohotane) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Mohotani (Mohotane, Mohotane) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Marquesas Islands
Mohotani (Mohotane, Mohotane) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2004) (voucher ID: PTBG 42526)
Taxon name on voucher: Urochloa reptans
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 4095 (PAP)
Adventice
French Polynesia
Marquesas Islands
Ua Huka (Huahuna, Uahuka) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Ua Huka (Huahuna, Uahuka) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: K.R. Wood 6421 (PAP)
Adventice
French Polynesia
Marquesas Islands
Ua Huka (Huahuna, Uahuka) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1997) (voucher ID: PTBG 27252)
Taxon name on voucher: Urochloa reptans (L.) C. A. Gardner & C. E. Hubb.
French Polynesia
Marquesas Islands
Ua Huka (Huahuna, Uahuka) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2004) (voucher ID: PTBG 41967)
Taxon name on voucher: Urochloa reptans (L.) C.A. Gardner & C.E. Hubb
French Polynesia
Marquesas Islands
Ua Pou (Huapu, Uapou, Uapu) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Ua Pou (Huapu, Uapou, Uapu) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Society Islands
Bora Bora Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
As Brachiaria reptans (C. Linnaeus) C.A. Gardner & C.E. Hubbard. Voucher cited: J. Florence 12083 (PAP)
Adventice
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
Welsh, S. L. (1998) (p. 330)
Voucher cited: Moore 155
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Welsh, S. L. (1998) (p. 330)
Voucher cited: Florence 4609
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
Guam
Guam Island
Guam Island introduced
invasive
Stone, Benjamin C. (1970) (p. 203)
Voucher cited: Stone 4186 (GUAM)
Guam
Guam Island
Guam Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 52)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Herbst, Derral R./Clayton, W. D. (1998) (p. 20)
Voucher cited: Neal s.n. (BISH 119991)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
Gargominy, Oliver/Bouchet, Philipe/Pascal, Michel/Jaffre, Tanguy/Tourneu, Jean-Christophe (1996) (p. 380)
Largement répandue sur la Grande-Terre.
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
Tassin, Jacques (2005)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
MacKee, H. S. (1994) (p. 57)
Voucher cited: Vieillard 1476
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 52)
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island native
Fosberg, F. R./Canfield, Joan E. (1980) (p. 193)
Voucher cited: Canfield 407 (US)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island)   Henty, E. E. (1969) (p. 39)
A weed of cultivation and overgrazed pasture.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) invasive
Henty, E. E./Pritchard, G. H. (1975) (p. 34)
From low altitudes to about 1200 m.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island)   Waterhouse, D. F. (1997) (p. 66)
Philippines
Philippine Islands
Philippine Islands   Waterhouse, D. F. (1993) (p. 63)
Philippines
Philippine Islands
Philippine Islands   Merrill, Elmer D. (1925) (pp. 67-68)
In open waste places, old clearings, thickets, etc., at low and medium altitudes.
Samoa
Western Samoa Islands
Upolu Island   Whistler, W. A. (1988) (p. 47)
Solomon Islands
Solomon Islands
Solomon Islands   Swarbrick, John T. (1997) (p. 89)
Solomon Islands
Solomon Islands
Solomon Islands introduced
invasive
Hancock, I. R./Henderson, C. P. (1988) (p. 52)
Tonga
Ha‘apai Group
Ha‘apai Islands   Whistler, W. A. (1988) (p. 47)
Var. marquisense (Brown) Fosb. (Whistler, 1988).
Tonga
Tongatapu Group
‘Eua Island   Whistler, W. A. (1988) (p. 47)
Vanuatu
New Hebrides Islands
Vanuatu (Republic of)   Waterhouse, D. F. (1997) (p. 66)
Wallis and Futuna
Wallis and Futuna (Horne) Islands
Wallis (‘Uvea) Island introduced
invasive
Morat, Ph./Veillon, J.-M. (1985)
Morat & Veillon, 1985, cited in Meyer, 2007
Wallis and Futuna
Wallis and Futuna (Horne) Islands
Wallis and Futuna Islands   Whistler, W. A. (1988) (p. 47)
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, Ernst/Scholz, Hildemar (1980) (p. 23)
China
China
China (People's Republic of)   Hafliger, Ernst/Scholz, Hildemar (1980) (p. 23)
Indonesia
Indonesia
Indonesia (Republic of)   Waterhouse, D. F. (1993) (p. 63)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 192)
As Brachiaria reptans Gardn. & Hubb.
Malaysia
Malaysia
Malaysia (country of)   Waterhouse, D. F. (1993) (p. 63)
Taiwan
Taiwan Island
Taiwan Island   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 53)
Thailand
Thailand
Thailand (Kingdom of)   Waterhouse, D. F. (1993) (p. 63)
Vietnam
Vietnam
Vietnam (Socialist Republic of)   Waterhouse, D. F. (1993) (p. 63)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia (Indian Ocean offshore islands)
Christmas Island Group
Christmas Island introduced
invasive
Swarbrick, J. T. (1997) (p. 106)
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 53)


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This page was created on 21 AUG 2002 and was last updated on 21 JUN 2010.