Pacific Island Ecosystems at Risk (PIER)

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Ipomoea obscura
(L.) Ker Gawl., Convolvulaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 13 (Go to the risk assessment)

Other Latin names:  Convolvulus obscurus L.

Common name(s): [more details]

Chinese: xiao xin ye shu

English: obscure morning-glory

Habit:  vine

Description:  "Vines; stems twining or sometimes prostrate, herbaceous, slender, up to ca. 3 m long, glabrate or sometimes pilose.  Leaf blades chartaceous, ovate to cordate, 2.7-9 cm long, pubescent or glabrate, margins entire, apex acuminate or apiculate, base cordate, petioles about as long as blades.  Flowers solitary or several, peduncles 3.5-4 cm long, pedicels 10-20 mm long, bracts scale-like; sepals narrowly to broadly ovate, 4-8 mm long, minutely verrucose, glabrous or sparsely pilose, margins scarious, apex acute or apiculate; corolla yellow or orange to white, usually the limb white and nectar-guides yellow, the throat purple or brown-tinged, campanulate, 1.4-2.5 cm long.  Capsules brown, globose, 0.8-1.2 cm long, glabrous.  Seeds 1-4, black, ovoid, 5-5.5 mm long, appressed pubescent or velvety pubescent" (Wagner et al., 1999; pp. 557-559).

Habitat/ecology:  In Hawai‘i, "naturalized in dry, disturbed areas, 3-250 m" (Wagner et al., 1999; pp. 557-559).  In Fiji, "sometimes locally frequent near sea level in thickets and open places, along roadsides and in canefields" (Smith, 1991; oo, 68-69). In New Caledonia, "principalement dans la végétation secondaire, surtout rudérale" (Heine, 1984; pp. 78, 80).

Propagation:  Seed

Native range:  Tropical East Africa, Mascarene Islands, tropical Asia, throughout Malesia to northern Australia and Fiji (Wagner et al., 1999; pp. 557-559).

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
Tinian Island introduced
Raulerson, L. (2006) (p. 57)
Cook Islands
Southern Cook Islands
Ma‘uke Island   McCormack, Gerald (2013)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
invasive
Josekutty, P. C./Wakuk, E. E./Joseph, M. J. (2002) (p. 62)
Fiji
Fiji Islands
Vanua Levu Island native
Smith, Albert C. (1991) (pp. 68-69)
Vouchers cited: Smith 6625, DA 10519
Fiji
Fiji Islands
Viti Levu Island native
Smith, Albert C. (1991) (pp. 68-69)
Vouchers cited: Greenwood 821, Greenwood 1289, DA 10320, DA 10436, DA 10893
French Polynesia
Gambier Islands
Mangareva (Gambier) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Gambier Islands
Mangareva (Gambier) Island native
St. John, Harold (1988) (p. 22)
Voucher cited: St. John 15227 (BISH)
French Polynesia
Gambier Islands
Taravai Island native
St. John, Harold (1988) (p. 22)
Voucher cited: St. John 14780 (BISH)
French Polynesia
Marquesas Islands
Hiva Oa Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 4101 (PAP)
Adventice
French Polynesia
Marquesas Islands
Tahuata (Tuhuata) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Tahuata (Tuhuata) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 39427)
Taxon name on voucher: Ipomoea obscura
French Polynesia
Marquesas Islands
Ua Huka (Huahuna, Uahuka) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Society Islands
Moorea Island   Welsh, S. L. (1998)
French Polynesia
Society Islands
Moorea Island   University of California (2006)
"Prefers rocky slopes, fences, or low ground-cover as a substrate; disturbed areas".
French Polynesia
Society Islands
Moorea Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Society Islands
Raiatea (Havai) Island   Welsh, S. L. (1998)
French Polynesia
Society Islands
Raiatea (Havai) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 3498 (PAP)
Adventice
French Polynesia
Society Islands
Taha‘a Island   Fosberg, F. R. (1997) (p. 32)
French Polynesia
Society Islands
Tahiti Island   Welsh, S. L. (1998)
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Vouchers cited: J. Florence 2277 (PAP), J. Florence 3179 (PAP), F.R. Fosberg 62715 (PAP), F.R. Fosberg 62921 (PAP), F.R. Fosberg 65018 (PAP)
Adventice
French Polynesia
Tuamotu Archipelago
Makatea (Ma‘atea) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Tuamotu Archipelago
Niau Atoll introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Austral (Tubuai) Islands
Rimatara (Rimitara) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
French Polynesia
Austral (Tubuai) Islands
Rurutu Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Adventice
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 225)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 557-559)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 557-559)
Voucher cited: Faurie 1039 (P)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Oppenheimer, Hank (2007) (p. 22)
Voucher cited: Oppenheimer H100641 (BISH, PTBG)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 557-559)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
Oppenheimer, Hank L. (2003) (p. 10)
Voucher cited: Oppenheimer H110132 (BISH, PTBG)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 557-559)
New Caledonia
Îles Loyauté (Loyalte Islands)
Îles Ouvéa (Ouvea Atoll) introduced
MacKee, H. S. (1994) (p. 41)
Voucher cited: Däniker 2079
New Caledonia
New Caledonia
New Caledonia Islands   Swarbrick, John T. (1997) (p. 93)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
Tassin, Jacques (2005)
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
MacKee, H. S. (1994) (p. 41)
Vouchers cited: Baumann 6120, Veillon 32 (NOU), MacKee 11928, MacKee 15015, MacKee 31190
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands   Merrill, Elmer D. (1923) (p. 366)
In open grasslands and borders of thickets at low and medium altitudes, often common.
Solomon Islands
Solomon Islands
Solomon Islands   Swarbrick, John T. (1997) (p. 93)
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 83)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Cambodia
Cambodia
Cambodia (Kingdom of) 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)
Weedy in thickets, open forests, sandy places, seashores; 0-1600 m. Guangdong, Hainan (Nanhai Zhudao), Yunnan.
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 223)
On sandy beach, in thin forests or thickets.
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 187)
Malaysia
Malaysia
Malaysia (country of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore
Singapore
Singapore (Republic of) native
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 51)
Common
Taiwan
Taiwan Island
Taiwan Island native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Weedy in thickets, open forests, sandy places, seashores; 0-1600 m.
Thailand
Thailand
Thailand (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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 native
Orchard, Anthony E., ed. (1993) (p. 17)
Mauritius
Mautitius Islands (Mauritius and Rodrigues)
Mauritius Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Seychelles
Seychelles Islands
Frégate Island   Robertson, S. A./Todd, D. M. (1983) (p. 49)
Voucher cited: Todd 10
Seychelles
Seychelles Islands
Seychelles Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)


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This page was created on 4 AUG 2002 and was last updated on 21 OCT 2010.