Pacific Island Ecosystems at Risk (PIER)

  [   PIER species lists  ]   [   PIER home  ]

Dentella repens
(L.) J.R. Forst., Rubiaceae
Click on an image for links to BIGGER PICTURES


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Oldenlandia repens L.

Common name(s): [more details]

Chamorro: borduegas

Chinese: xiao ya cao

English: dentella

I-Kiribati: te uteute n Imatang

Habit:  herb

Description:  "Dwarf herbs, creeping, much branched, rather fleshy; branches flattened to angled, glabrous or puberulent, often rooting at nodes. Leaves subsessile to shortly petiolate; petiole to 1 [-4] mm; blade drying stiffly papery, oblong-lanceolate, oblanceolate, or spatulate, 4-7 [-10] x 1-2 [-4] mm, glabrous or sparsely hirtellous at least along margins and principal veins, base cuneate to acute, margins flat, apex obtuse to acute; secondary veins not visible; stipules triangular, ca. 1 mm, entire to erose. Flowers solitary at forks of branchlets or rarely along stems, subsessile or with pedicel to 1 [-2] mm. Calyx with ovary portion subglobose, ca. 1 x 1-1.5 mm, densely papillose-villous with flattened trichomes; limb 1-1.2 mm, deeply lobed; lobes narrowly triangular. Corolla white or pale yellow, 3-8 [-12] mm, glabrous outside, sparsely villous inside throat; lobes triangular-ovate, 1-2 mm, acute. Fruit compressed globose, 3-5 x 3-5 mm, densely villous with multicellular, transparent, flattened, bulbous-tipped trichomes; seeds 0.3-0.5 mm"  (Flora of China online).

"Creeping low herb; leaves elliptic or oblong or oblanceolate but short, acute at both ends, 1-nerved, 1 cm long, 4 mm wide, on petiole 3 mm long; stipules ovate-subrotund; stems somewhat 4-angled; pedicels 1-2 mm long; calyx 2-3 mm; corolla about 1 cm long, tube yellowish, limb white (lobes each with a basal small purplish spot); throat pilose; fruit 3-4 mm, glabrous or beset with glassy hairs (these hollow), with many small angular seeds.  The flowers are often borne between branches in the V-shaped fork and are nearly sessile." (Stone, 1970; pp. 542-543).

Habitat/ecology:  "A tropical weed" (Stone, 1970; pp. 542-543).  In China (native), "wet sites in fields; sea level or higher"  (Flora of China online).

Propagation:  Seed

Native range:  "This herb is native to New Caledonia or somewhere else in Melanesia, but is now widespread in the Pacific as a weed of open sunny places" (Whistler & Steele, 1999; p. 63). China, Taiwan, southeast Asia, Australia; 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
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Rota Island introduced
Fosberg, F. R./Sachet, M.-H./Oliver, R. L. (1993) (p. 56)
Vouchers cited: Herbst & Falanruw 6696 (US), Raulerson 19152 (US)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Saipan Island introduced
Raulerson, L. (2006) (p. 64)
Federated States of Micronesia
Chuuk Islands
Puluwat (Pwonowót) Atoll introduced
invasive
Manner, H. I./Mallon, E. (1989) (p. 59)
Voucher cited: Manner & Mallon 190 (GUAM)
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island introduced
Fosberg, F. R./Sachet, M.-H./Oliver, R. L. (1993) (p. 56)
Voucher cited: Fosberg & Sared 60315 (US, BISH, POM, NY, L)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
invasive
Lorence, David H./Flynn, Timothy (2010) (p. 23)
Voucher cited: Lorence 7853 (PTBG)
Naturalized
Federated States of Micronesia
Kosrae Island
Kosrae Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1996) (voucher ID: PTBG 21140)
Taxon name on voucher: Dentella repens
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
invasive
Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 128)
Vouchers cited: D.H. Lorence 8063 (PTBG), D.H. Lorence 8106 (PTBG), D.H. Lorence 9551 (COM, NY, PTBG, US)
Naturalized
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1997) (voucher ID: PTBG 28105)
Taxon name on voucher: Dentella repens Forst. f.
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1997) (voucher ID: PTBG 28675)
Taxon name on voucher: Dentella repens Forst. f.
Federated States of Micronesia
Yap Islands
Ulithi Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 264)
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) 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) (pp. 542-543)
Voucher cited: Stone 4091 (GUAM)
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 264)
Kiribati
Tungaru (Gilbert) Islands
Abemama Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 76)
Voucher: Imada 2003-158 (BISH 697769)
Kiribati
Tungaru (Gilbert) Islands
Butaritari Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 77)
Voucher: Imada 2003-48 (BISH 697663)
Kiribati
Tungaru (Gilbert) Islands
Makin Island introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. Observed at Makin airstrip.)
Kiribati
Tungaru (Gilbert) Islands
Tarawa Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 74)
Voucher: Imada 2003-19 (BISH 697634)
Marshall Islands
Ralik Chain
Jaluit (Jãlwõj) Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 264)
Marshall Islands
Ralik Chain
Jaluit (Jãlwõj) Atoll introduced
invasive
Fosberg, F. R./Sachet, M.-H. (1962) (p. 35)
Vouchers cited: Fosberg 39458 (US), Fosberg 41397 (US)
Marshall Islands
Ralik Chain
Kili (Kõle) Atoll   Vander Velde, Nancy (year unknown)
Marshall Islands
Ralik Chain
Kwajalein (Kuwajleen) Atoll introduced
invasive
Whistler, W. A./Steele, O. (1999) (p. 63)
Vouchers cited: Fosberg 41420, Fosberg 48017, Herbst 8885, Herbst 8942, Herbst 9017, Whistler 11242
Marshall Islands
Ratak Chain
Majuro (Mãjro) Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 264)
Marshall Islands
Ratak Chain
Majuro (Mãjro) Atoll introduced
Vander Velde, Nancy (2003) (p. 118)
Rare, possibly now extirpated.
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 264)
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
invasive
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 59)
Voucher: Lorence 9843 (PTBG, BNM)
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 136)
Taxon name on voucher: Dentella repens
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island   Beleu National Museum (Republic of Palau. Koror.) (1990) (voucher ID: BNM 10187)
Taxon name on voucher: Dentella repens L.
Palau
Palau (Belau ) (main island group)
Malakal (Ngemelachel) Island introduced
invasive
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 59)
Voucher: Lorence 9719 (PTBG, BNM, NY, US)
Palau
Palau (Belau ) (main island group)
Malakal (Ngemelachel) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 12)
Taxon name on voucher: Dentella repens
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 264)
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island introduced
invasive
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 59)
Voucher: Lorence 9764 (PTBG, BNM)
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 56)
Taxon name on voucher: Dentella repens
Philippines
Philippine Islands
Philippine Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands native
Merrill, Elmer D. (1923) (p. 492)
In open waste places in and about towns at low and medium altitudes.
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) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Western Australia
Australia
Australia (continental)
Northern Territory native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia
Australia (continental)
Queensland native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
China (People's Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Wet sites in fields; sea level or higher. Guangdong, Hainan, Xinjiang, Yunnan.
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore
Singapore
Singapore (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore
Singapore
Singapore (Republic of) uncertain if introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 33)
Weed of uncertain origin
Taiwan
Taiwan Island
Taiwan Island native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Wet sites in fields; sea level or higher. Guangdong, Hainan, Xinjiang, Yunnan.
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
British Indian Ocean Territory
Chagos Archipelago
Diego Garcia Island   Topp, J. M. W. (1988) (p. 8)
British Indian Ocean Territory
Chagos Archipelago
Diego Garcia Island introduced
invasive
Whistler, W. Arthur (1996) (p. 29)


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 OCT 2003 and was last updated on 23 OCT 2012.