|
(L.) P.Beauv., Poaceae |
|
Present on Pacific Islands? yes
Threat only at high elevations? no
Other Latin names: Oplismenus setarius (Lam.) Roem. & Schult.
Common name(s): [more details]
|
English: basket grass, bristle basket grass, grass from Tonga, woods grass |
|
Hawaiian: honohono, honohono kukui, honohono maoli |
|
Spanish: cañamazo de monte |
Habit: grass
Description: "Perennials; culms decumbent, but flowering culms ascending, 2-4 dm long, glabrous or scabrous to short-pilose, nodes usually densely short-pilose. Sheaths glabrous or appressed pubescent, villous on margins, the surface sometimes hirsute, collar villouos; ligule membranous, 0.6-0.8 mm long, truncate, margins with setae, 1-2 mm long; blades thin, lanceolate, usually somewhat asymmetrical at base, 5-10 cm long, 8-17 mm wide, upper surface very sparsely hispid, lower surface hispid or glabrous, apex acuminate. Racemes ascending to appressed, 7-15 cm long, the lowest raceme 2-4 cm long, rachis scabrous or hispidulous in upper part, sometimes hispid on upper angles; adjacent spikelet pairs of lower racemes 0.5-4 mm apart; glumes ovate, 5-7-nerved, sparsely pilose, apex acute, first glume with an awn 5-10 mm long, second glume similar to first glume, but with an awn 1-2 mm long; first lemma similar to second glume, 3-4 mm long, short-awned; first palea, if present, hyaline, 3-3.5 mm long; second lemma white, ovate-lanceolate, coriaceous, 2.5-3 mm long, glabrous, glossy, margins enclosing palea, apex acute; second palea white, ovate, coriaceous, 2-2.5 mm long, glabrous, glossy, apex acute, margins inrolled. Cayopsis ca. 2.5 mm long" (Wagner et al., 1999; p. 1565).
Description from World Grass Species.
Habitat/ecology: "In shady habitats, usually at low elevations" (Wiggins & Porter, 1971; pp. 860-862). In Hawaii, "naturalized and common in lightly shaded to densely shaded mesic valleys and mesic forest, sometimes in disturbed wet forest, 10-920 m" (Wagner et al., 1999; p. 1565); "displaces natives on forest floors and trailsides" (Motooka et al., 2003). In Fiji, "moderately common..., occurring from sea level to about 600 m on hillsides and the edges of forest; it is usually found in damp, shady places" (Smith, 1979; pp. 343-344). "Occasional in sunny places and sometimes in native coastal forest" (Whistler, 1988; p. 54).
Propagation: Seed
Native range: Pantropical. Fosberg et al. (1987; pp. 50-51) list as native in Micronesia.
Presence:
| Pacific | |||
|
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
|
American Samoa
Manua Islands |
Ofu Island |
Whistler, W. A. (1990)
Vouchers cited: Yuncker 9501a, Whistler 3454 |
|
|
American Samoa
Manua Islands |
Tau Island |
Whistler, W. A. (1990)
Vouchers cited: Whistler 1402, Whistler 3565 |
|
|
Australia (Pacific offshore islands)
Lord Howe Island |
Lord Howe Island |
native
|
Orchard, Anthony E., ed. (1994) (p. 22)
"A grass of the forest floor, where it is common and mat-forming". Vouchers cited: A.N. Rodd 1756 (K, NSW), J. Pickard in A.N. Rodd 1443 (K, NSW), C. Moore 37 (K, MEL) |
|
Australia (Pacific offshore islands)
Norfolk Islands |
Norfolk Island |
native
|
Orchard, Anthony E., ed. (1994) (p. 12)
"A grass of the forest floor, where it is common and mat-forming". Vouchers cited: W.R. Sykes NI 51 (CHR), W.R. Sykes NI 52 (CHR), W.R. Sykes NI 53 (CHR); M. Lazarides 8094 (CANB, K); 1804-1805, F.L. Bauer (K, W) |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Anatahan Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50)
Var. imbecillis (R. Br.) Fosberg & Sachet |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Anatahan Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Raulerson 1094 (US) |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Asuncion Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50)
Var. imbecillis (R. Br.) Fosberg & Sachet |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Asuncion Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Falanruw 3057 (US) |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Rota Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50)
Varieties hirtellus and imbecillis (R. Br.) Fosb. & Sachet |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Rota Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Voucher cited: Herbst & Falanruw 6751 (US); var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Evans 2209 (US) |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Sarigan Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50)
Varieties hirtellus and microphyllus (Honda) Fosb. & Sachet |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Sarigan Island |
native
|
Ohba, T. (1994) (p. 65)
Voucher cited: CBM-BS-58912 |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Sarigan Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. microphyllus (Honda) Fosberg & Sachet; voucher cited: Falanruw 1789 (US) |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Tinian Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50)
Var. imbecillis (R. Br.) Fosberg & Sachet |
|
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands |
Tinian Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Hosaka 2860 (US, BISH), POM, K) |
|
Cook Islands
Southern Cook Islands |
Mangaia Island | McCormack, Gerald (2007) | |
|
Cook Islands
Southern Cook Islands |
Mauke Island | McCormack, Gerald (2007) | |
|
Cook Islands
Southern Cook Islands |
Mitiaro Island | McCormack, Gerald (2007) | |
|
Ecuador (Galápagos Islands)
Fernandina Group |
Fernandina Island |
probably introduced
invasive |
Charles Darwin Research Station (2005) |
|
Ecuador (Galápagos Islands)
Isabela Group |
Volcan Alcedo |
probably introduced
invasive |
Charles Darwin Research Station (2005) |
|
Ecuador (Galápagos Islands)
Isabela Group |
Volcan Sierra Negra |
probably introduced
invasive |
Charles Darwin Research Station (2005) |
|
Ecuador (Galápagos Islands)
San Cristóbal Group |
San Cristóbal Island |
probably introduced
invasive |
Charles Darwin Research Station (2005) |
|
Ecuador (Galápagos Islands)
Santa Cruz Group |
Santa Cruz Island |
probably introduced
invasive |
Charles Darwin Research Station (2005) |
|
Ecuador (Galápagos Islands)
Santiago Group |
Santiago Island |
probably introduced
invasive |
Charles Darwin Research Station (2005) |
|
Federated States of Micronesia
Pohnpei Islands |
Nukuoro Atoll |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50) |
|
Federated States of Micronesia
Pohnpei Islands |
Nukuoro Atoll |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Niering 740 (US) |
|
Federated States of Micronesia
Pohnpei Islands |
Pohnpei Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50) |
|
Federated States of Micronesia
Pohnpei Islands |
Pohnpei Island |
Glassman, S. F. (1952) (p. 132)
var. imbecilis (R. Br.) Fosb. & Sachet, voucher cited: Glassman 2843 (US) |
|
|
Federated States of Micronesia
Pohnpei Islands |
Pohnpei Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Vouchers cited: Ledermann 13808 (B), Hosokawa 5577 US); var. imbecillis (R. Br.) Fosberg & Sachet; vouchers cited: Ledermann 13607 (B), Glassman 2843 (US), Hatusima 11128 (FU); var. microphyllus (Honda) Fosberg & Sachet; voucher cited: Nakao in 1941 (KYO) |
|
Federated States of Micronesia
Yap Islands |
Yap (Waqab) Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50) |
|
Federated States of Micronesia
Yap Islands |
Yap (Waqab) Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Fosberg 60112 (US, BISH, POM, Mo, CANB, L, K, TI); var. microphyllus (Honda) Fosberg & Sachet; vouchers cited: Kanehira & Hatusima 4336 (FU), Hosokawa 8990 (US) |
|
Fiji
Fiji Islands |
Fulanga Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Kambara Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Kanathea Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Koro Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Mango Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Matuku Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Mbatiki Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Moala Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Nairai Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Ngau Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Totoya Island |
native
|
Smith, Albert C. (1979) (pp. 343-344)
Voucher cited: DA 13245 |
|
Fiji
Fiji Islands |
Vanua Mbalavu Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Vatulele Island |
native
|
Smith, Albert C. (1979) (pp. 343-344) |
|
Fiji
Fiji Islands |
Viti Levu Island |
native
|
Smith, Albert C. (1979) (pp. 343-344)
Vouchers cited: DA 12630 (Melville et al. 7001), DA 8004, DA 8005, DA 16765 |
|
French Polynesia
Society Islands |
Maupiti (Maurua) Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1987) (p. 14)
var. imbecilis (R. Br.) Fosb. & Sachet; vouchers cited: Fosberg 64778 (US), Fosberg 64801 (US) |
|
French Polynesia
Society Islands |
Raiatea (Havai) Island |
Fosberg, F. R. (1997) (p. 103)
var. imbecilis (R. Br.) Fosb. & Sachet |
|
|
French Polynesia
Society Islands |
Tahiti Island |
Fosberg, F. R. (1997) (p. 103)
Also var. imbecilis (R. Br.) Fosb. & Sachet |
|
|
Guam
Guam Island |
Guam Island |
native
|
Stone, Benjamin C. (1970) (p. 214) |
|
Guam
Guam Island |
Guam Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50)
Varieties hirtellus, imbecillis and microphyllus. |
|
Guam
Guam Island |
Guam Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Voucher cited: G. C. Moore 201 (US); var. imbecillis (R. Br.) Fosberg & Sachet; vouchers cited: Anderson 316 (US, BISH, POM), Stone 3965 (US, GUAM), Fosberg 35299 (US, BISH, POM, BRI, P), Stone 4522 (GUAM); var. microphyllus (Honda) Fosberg & Sachet; vouchers cited: G. C. Moore 228 (US), Fosberg 35374 (US, BISH, MO, L, BRI) |
|
State of Hawaii
Hawaiian Islands |
Hawaii (Big) Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1565) |
|
State of Hawaii
Hawaiian Islands |
Kauai Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1565) |
|
State of Hawaii
Hawaiian Islands |
Lānai Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1565) |
|
State of Hawaii
Hawaiian Islands |
Maui Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1565) |
|
State of Hawaii
Hawaiian Islands |
Molokai Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1565) |
|
State of Hawaii
Hawaiian Islands |
Oahu Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1565) |
|
Marshall Islands
Ralik Chain |
Enewetak (Ãnewetak) Atoll |
probably native
|
Fosberg, F. Raymond (1990) (p. 22) |
|
Marshall Islands
Ratak Chain |
Majuro (Mãjro) Atoll |
probably native
|
Fosberg, F. Raymond (1990) (p. 22) |
|
Nauru
Nauru Island |
Nauru Island |
introduced
invasive |
Thaman, R. R./Fosberg, F. R./Manner, H. I./Hassall, D. C. (1994) (p. 72)
Voucher cited: Thaman & Manner 22322 (SUVA) Rare |
|
New Zealand (offshore islands)
Kermadec Islands |
Raoul Island |
introduced
|
Sykes, W. R./West, C. J. (1996) (p. 457) |
|
New Zealand (offshore islands)
Kermadec Islands |
Raoul Island |
native
|
Edgar, E./Connor, H. (2000) (pp. 553-556)
"Shaded slopes and coastal forest". |
|
Niue
Niue |
Niue Island |
introduced
|
Sykes, W. R. (1970) (p. 247)
Voucher cited: CHR 168736 |
|
Niue
Niue |
Niue Island |
introduced
invasive |
Whistler, W. A. (1988) (p. 54) |
|
Niue
Niue |
Niue Island |
introduced
invasive |
Whistler, W. A./Atherton, J. (1997) (p. 55)
Voucher cited: Whistler 10873 |
|
Palau
Palau (main island group) |
Babeldaob Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50) |
|
Palau
Palau (main island group) |
Babeldaob Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; vouchers cited: Canfield 263 (US), Hosaka 6877 (US), Fosberg 32411 (US, BISH, POM, MO, BRI) |
|
Palau
Palau (main island group) |
Koror Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50) |
|
Palau
Palau (main island group) |
Koror Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Kanehira & Hatusima 4450 (FU) |
|
Palau
Palau (main island group) |
Malakal Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50) |
|
Palau
Palau (main island group) |
Malakal Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Evans 604 (US, BISH, K, MO) |
|
Palau
Palau (main island group) |
Ngerkebesang Island |
native
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 50) |
|
Palau
Palau (main island group) |
Ngerkebesang Island |
native
|
Fosberg, F. R./Sachet, M.-H. (1982) (pp. 77-80)
Var. imbecillis (R. Br.) Fosberg & Sachet; voucher cited: Hardy 107 (US, BISH) |
|
Pitcairn Islands
Pitcairn Islands |
Pitcairn Island |
introduced
|
St. John, H. (1987) (p. 23)
Voucher cited: Fosberg & B. Christian 11239 |
|
Samoa
Western Samoa Islands |
Western Samoa Islands | Whistler, W. A. (1988) (p. 54) | |
|
Tonga
Tongatapu Group |
Eua Island |
Whistler, W. A. (1992) (p. 100)
Voucher cited: Sykes 812 |
|
|
Tonga
Tongatapu Group |
Tongatapu Island |
Whistler, W. A. (1992) (p. 100)
Vouchers cited: Soakai 688, Soakai 736 |
|
|
Tonga
Vavau Group |
Late Island |
introduced
|
Sykes, W. R. (1981) (p. 352) |
|
Tonga
Vavau Group |
Vavau Island |
Whistler, W. A. (1992) (p. 100)
Voucher cited: Soakai 890 |
|
|
Wallis and Futuna
Wallis and Futuna (Horne) Islands |
Wallis and Futuna Islands | Whistler, W. A. (1988) (p. 54) | |
| Pacific Rim | |||
|
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
|
Colombia
Colombia |
Colombia (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
Costa Rica
Costa Rica |
Costa Rica (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
Ecuador (Mainland)
Ecuador |
Ecuador (Republic of) (continental) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
El Salvador
El Salvador |
El Salvador (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
Guatemala
Guatemala |
Guatemala (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
Honduras
Honduras |
Honduras (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
Mexico
Mexico |
Mexico (United Mexican States) | Hafliger, Ernst/Scholz, Hildemar (1980) (p. 72) | |
|
New Zealand
New Zealand |
New Zealand (country) |
native
|
Edgar, E./Connor, H. (2000) (pp. 553-556)
"Shaded slopes and coastal forest". |
|
Nicaragua
Nicaragua |
Nicaragua (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
Panama
Panama |
Panama (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
|
Perú
Perú |
Perú (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2007) |
Comments: Includes var. imbecillis (R. Br.) R. & S. and ssp. microphyllus (Honda) Ohwi (see Fosberg et al., 1987; pp. 50-51).
Control:
Chemical: "Probably susceptible to Glyphosate" (Motooka et al., 2003).
Additional information: Information from the book "Weeds
of Hawaiis Pastures and Natural Areas; An Identification and Management Guide"
(Motooka et al., 2003). (PDF format).
Additional online information about Oplismenus hirtellus is available from the Hawaiian Ecosystems at Risk project (HEAR).
Taxonomic information about Oplismenus hirtellus may be available from the Germplasm Resources Information Network (GRIN).
References:
Charles Darwin Research Station. 2005. CDRS Herbarium records.
Edgar, E./Connor, H. 2000. Flora of New Zealand, vol. V: Gramineae. Manaaki Whenua Press.
.
Fosberg, F. R. 1997. Preliminary checklist of the flowering plants and ferns of the Society Islands. Ed. by David R. Stoddart. U. Cal. Berkeley.
Fosberg, F. R./Sachet, M.-H. 1982. Micronesian Poaceae: Critical and distributional notes. Micronesica 18(2):45-102.
Fosberg, F. R./Sachet, M.-H. 1987. Flora of Maupiti, Society Islands. The Smithsonian Institution. Atoll Research Bulletin 294:1-70.
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce. 1987. A geographical checklist of the Micronesian monocotyledonae. Micronesica 20:1-126.
Fosberg, F. Raymond. 1990. A review of the natural history of the Marshall Islands. Atoll Research Bulletin No. 330. Smithsonian Institution, Washington. 100 pp.
Glassman, S. F. 1952. The flora of Ponape. Bishop Mus. Bull. 209: 1-152.
Hafliger, Ernst/Scholz, Hildemar. 1980. Grass weeds, vol. 1. CIBA-GEIGY Ltd., Basle, Switzerland. 142 pp. + plates.
McCormack, Gerald. 2007. Cook Islands biodiversity and natural heritage. On-line database.
Motooka, Philip/Castro, Luisa/Nelson, Duane/ Nagai, Guy/Ching, Lincoln. 2003. Weeds of Hawaiis Pastures and Natural Areas; An Identification and Management Guide. College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa. 184 pp.
Ohba, T. 1994. Flora and vegetation of the northern Mariana Islands, Micronesia. Biological Expedition to the Northern Mariana Islands, Micronesia. In A. Asakua & T. Furuki, eds. Natural History Research, Special issue no. 1, Chiba, Japan: Natural History Museum and Institute. pp. 13-69.
Orchard, Anthony E., ed. 1994. Flora of Australia. Vol. 49, Oceanic islands 1. Australian Government Publishing Service, Canberra.
Smith, Albert C. 1979. Flora Vitiensis nova: a new flora of Fiji. National Tropical Botanical Garden, Lawai, Kauai, Hawaii. Volume 1. 494 pp.
St. John, H. 1987. An account of the flora of Pitcairn Island with new Pandanus species. Honolulu, 65 pp.
Stone, Benjamin C. 1970. The flora of Guam. Micronesica 6:1-659.
Swarbrick, John T. 1997. Weeds of the Pacific Islands. Technical paper no. 209. South Pacific Commission, Noumea, New Caledonia. 124 pp.
Sykes, W. R. 1970. Contributions to the flora of Niue. New Zealand Department of Scientific and Industrial Research Bulletin 200, Wellington. 321 pp.
Sykes, W. R. 1981. The vegetation of Late, Tonga. Allertonia 2(6):323-353.
Sykes, W. R./West, C. J. 1996. New records and other information on the vascular flora of the Kermadec Islands. New Zealand Journal of Botany 34:447-462.
Thaman, R. R./Fosberg, F. R./Manner, H. I./Hassall, D. C. 1994. The flora of Nauru. Smithsonian Institution, Washington. Atoll Research Bulletin 392:1-223.
U.S. Dept. Agr., Agr. Res. Serv. 2007. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. 1999. Manual of the flowering plants of Hawaii. Revised edition. Bernice P. Bishop Museum special publication. University of Hawaii Press/Bishop Museum Press, Honolulu. 1919 pp. (two volumes).
Whistler, W. A. 1988. Checklist of the weed flora of western Polynesia. Technical Paper No. 194, South Pacific Commission, Noumea, New Caledonia. 69 pp.
Whistler, W. A. 1990. The weeds of Manua [unpublished checklist]. 18 pp.
Whistler, W. A. 1992. Flora of Tonga [unpublished checklist]. 107 pp.
Whistler, W. A./Atherton, J. 1997. Botanical survey of the Huvalu Forest Conservation Area, Niue. Unpublished technical report. 76 pp.
Wiggins, I. L./Porter, D. M. 1971. Flora of the Galapágos Islands. Stanford University Press. 998 pp.