L., Tetrachondraceae |
Present on Pacific Islands? yes
Primarily a threat at high elevations? no
Common name(s): [more details]
English: juniperleaf, rust weed, wireweed |
Habit: herb
Description: "Low, spreading, glabrous herb with somewhat angled stems up to 12 cm long, readily branching at most nodes. Leaves simple, opposite, blade linear, mostly 0.5-2.4 cm long, acuminate at the tip and base, surfaces glabrous, sometimes tinted red to orange, margins entire; subsessile. Inflorescence of solitary, sessile, axillary flowers. Corolla sympetalous, narrowly campanulate, 2.5-3 mm long, divided about halfway into 4 lobes; white. Ovary superior; stamens 4, epipetalous. Fruit an oval, laterally compressed, 2-lobed capsule 2-3 mm long, subtended by the 4 lanceolate, erect, slightly longer sepals. Distinguishable by its small herbaceous habit, linear opposite leaves often red to orange in color, tiny, solitary, axillary, sessile white flowers, and small 2-lobed capsule" (Whistler & Steele, 1999; p. 58).
Habitat/ecology: In Hawaii, "reported as naturalized in Hawaii Volcanoes National Park, Hawaii" (Wagner et al., 1999; p. 850). In the Marshall Islands, "a weed of open disturbed places, especially in sparse lawns with periodic mowing" (Kwajalein) (Whistler & Steele, 1999; p. 58); in lawns and ruderal areas (Majuro) (Vander Velde, 2003; p.103).
Propagation: Seed
Native range: Tropical America (Whistler & Steele, 1999; p. 58).
Presence:
Pacific | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
Ecuador (Galápagos Islands)
Isabela Group |
Isabela Island |
introduced
|
Charles Darwin Foundation (2008) |
Ecuador (Galápagos Islands)
Isabela Group |
Volcán Alcedo, Isabela Island |
introduced
invasive |
Charles Darwin Foundation (2008) |
Guam
Guam Island |
Guam Island |
introduced
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 211) |
Guam
Guam Island |
Guam Island |
introduced
|
Raulerson, L. (2006) (p. 55) |
State of Hawaii
Hawaiian Islands |
Hawaii (Big) Island |
introduced
invasive |
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 850) |
Marshall Islands
Ralik Chain |
Enewetak (Ãnewetak, Eniwetok) Atoll |
introduced
|
Fosberg, F. Raymond (1990) (p. 36) |
Marshall Islands
Ralik Chain |
Kwajalein (Kuwajleen) Atoll |
introduced
invasive |
Whistler, W. A./Steele, O. (1999) (p. 58)
Vouchers cited: Herbst 8980, Herbst 9018, Herbst 9030, Herbst 9050, Whistler 11169, Whistler 11259 |
Marshall Islands
Ratak Chain |
Majuro (Mãjro) Atoll |
introduced
invasive |
Vander Velde, Nancy (2003) (p. 103) |
Marshall Islands
Ratak Chain |
Mili (Mile) Atoll |
introduced
invasive |
Vander Velde, Nancy/Vander Velde, Brian (2010) (p. A17)
Uncommon; in fields, including runway, Mili, perhaps Tokewa. |
Marshall Islands
Ratak Chain |
Wotje (Wõjjã) Atoll |
introduced
|
Vander Velde, Nancy/Vander Velde, Brian (2009) (p. 2)
Voucher cited: Vander Velde 0514200925 |
Palau
Palau (Belau ) (main island group) |
Angaur (Ngeaur) Island |
introduced
|
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 211) |
Palau
Palau (Belau ) (main island group) |
Angaur (Ngeaur) Island |
Beleu National Museum (Republic of Palau. Koror.) (1970) (voucher ID: BNM 496)
Taxon name on voucher: Polypremum procumbens L. |
|
Palau
Palau (Belau ) (main island group) |
Angaur (Ngeaur) Island |
Beleu National Museum (Republic of Palau. Koror.) (1977) (voucher ID: BNM 906)
Taxon name on voucher: Polypremum procumbens L. |
Control: If you know of control methods for Polypremum procumbens, please let us know.