Pacific Island Ecosystems at Risk (PIER)

  [   PIER species lists  ]   [   PIER home  ]

Polygonum minus
Huds., Polygonaceae
Click on an image for links to BIGGER PICTURES


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Persicaria minor (Huds.) Opiz

Common name(s): [more details]

Chamorro: mamaca, mamaka

Chuukese: opulöulöu, teerow

English: slender persicaria, small smartweed, small water-pepper, smartweed

French: petite renouée, renouée fluette

Kwara‘ae: fa‘i ngwagwali

Palauan: sekes

Habit:  herb

Description:  "Perennial herb, prostrate, decumbent or ascending to c. 1 m; stems very slender (c. 1 mm thick) to fairly stout (4 mm), glabrous or nearly so.  Leaves shortly petiolate, lanceolate to almost linear, mostly 5-12 cm long; dotted with glands, with upward-pointing appressed hairs on petioles, margins and larger nerves, sometimes lacking on upper surface and sparse beneath, rarely dense on and between nerves on both surfaces; sheaths short, glabrous to with dense appressed hairs; ocreas tubular, 8-20 mm long, strongly nerved, clothed sparsely to very densely with appressed hairs, transversely truncate, with fine but stiff bristles, 5-10 mm long (rarely shorter, to 1 mm) from apex.  Inflorescence apical, of 1 to several lax to fairly dense pseudospikes, 1-6 cm long; bracts funnel-shaped, obliquely truncate, ciliate on margins, 3-6-flowered. Perianth white or pink, 1.5-2 mm long, increasing to c. 2.5 mm after anthesis; stamens 6; styles 2.  Fruit lenticular with strongly convex elliptic faces, rather sharp-angled near apex (sometimes a few trigonous), 1.5-2 x 1-1.2 mm, black or dark brown, shining"  (Womersley, 1978; pp. 236-238).

Habitat/ecology:  "Roadsides, swamps, ditches, etc." (Fernald, 1970; p. 584).  In Guam, "occasional, locally abundant, along freshwater streams" (Stone, 1970; p. 264).  In Papua New Guinea (native), "found from sea level to an altitude of 2500 m.  At the lower levels a plant of distinctly wet situations, such as swamps, ditches, stream and lake margins, but at higher altitudes also a weed of cultivation, plantations and pastures"  (Womersley, 1978; p. 238).

Propagation:  Seed

Native range:  Europe. Fosberg et al. (1979; p. 66) and Stone (1970; p. 264) list var. procerum (Danser) Steward as native to Micronesia.

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Federated States of Micronesia
Chuuk Islands
Dublon (Tonowas) Island   Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Federated States of Micronesia
Chuuk Islands
Lukunor (Núkúnooch) Atoll native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Federated States of Micronesia
Chuuk Islands
Namoluk (Nómwunuuk) Atoll   Marshall, Mae/Fosberg, F. R. (1975) (p. 33)
Var. procerum (Danser) Steward. Voucher cited: Marshall 79 (US)
Federated States of Micronesia
Chuuk Islands
Namonuito (Namonweito, Nómwun Wiité) Atoll native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Federated States of Micronesia
Chuuk Islands
Puluwat (Pwonowót) Atoll native
Manner, H. I./Mallon, E. (1989) (p. 44)
Var. procerum (Danser) Steward. Voucher cited: Manner & Mallon 290 (GUAM).
Federated States of Micronesia
Chuuk Islands
Satawan Atoll native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Federated States of Micronesia
Chuuk Islands
Udot Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Federated States of Micronesia
Chuuk Islands
Ulalu (Romonum) Island   Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Federated States of Micronesia
Yap Islands
Ifalik (Ifaluk) Atoll native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Federated States of Micronesia
Yap Islands
Lamotrek Atoll native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Federated States of Micronesia
Yap Islands
Woleai Atoll native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Guam
Guam Island
Guam Island native
Stone, Benjamin C. (1970) (p. 264)
Var. procerum (Danser) Steward; voucher cited: Stone 4446 (GUAM)
Guam
Guam Island
Guam Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Var. procerum (Danser) Steward
Guam
Guam Island
Guam Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (year unknown) (voucher ID: PTBG 32617)
Taxon name on voucher: Polygonum minus var procerus
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
MacKee, H. S. (1994) (p. 117)
Voucher cited: Bougier s.n.
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island native
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 104)
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island   Beleu National Museum (Republic of Palau. Koror.) (1970) (voucher ID: BNM 620)
Taxon name on voucher: Polygonum minus var procerum
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1983) (voucher ID: PTBG 23517)
Taxon name on voucher: Polygonum minus var procerus
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 66)
Papua New Guinea
Bougainville Islands
Bougainville Island   Foreman, D. B. (1971) (p. 53)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) native
Womersley, John S., ed. (1978) (p. 238)
Philippines
Philippine Islands
Philippine Islands   Hafliger, Toni J./Wolf, Matthias (1988) (p. 290)
Philippines
Philippine Islands
Philippine Islands   Merrill, Elmer D. (1923) (p. 123)
In open wet places, altitude 1,200 to 1,500 m.
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 101)
var. procerum (Danser) Steward
Solomon Islands
Solomon Islands
Solomon Islands native
Womersley, John S., ed. (1978) (p. 238)
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)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 289)
China
China
China (People's Republic of)   Hafliger, Toni J./Wolf, Matthias (1988) (p. 290)
Indonesia
Indonesia
Indonesia (Republic of)   Hafliger, Toni J./Wolf, Matthias (1988) (p. 290)


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

  [   PIER species lists  ]   [   PIER home  ]

This page was created on 26 JUL 2002 and was last updated on 17 FEB 2007.