Pacific Island Ecosystems at Risk (PIER)

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Merremia hederacea
(Burm. f.) Hallier f., Convolvulaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Evolvulus hederaceus Burm. f.; Merremia convolvulacea Dennst. ex Hallier f.

Common name(s): [more details]

Chinese: li lan wang

English: ivy woodrose

Yapese: galili ne sëpan magacol, watchagar

Habit:  vine

Description:  A small creeping or twining vine; "petioles tuberculate; leaves entire or 3-lobed, 1-5 cm long, 1-4 cm wide; outer calyx-lobes 3.5-4 mm long, essentially glabrous, obviously mucronate, obovate-spathulate and notched; inner calyx-lobes to 5 mm long; corolla 1 cm long, yellow; capsule depressed-globose, or subconic, often obscurely 4-angled, finely wrinkled; brown"  (Stone, 1970).

"A twining or prostrate herb; stems slender, glabrous or pubescent, often minutely tuberculate, sometimes rooting at the nodes. Leaf-blade ovate in outline, 1.5-5 cm. long, 1.25-4 cm. wide, obtuse and mucronulate at the apex, cordate at the base, entire, crenate, or shallowly to deeply 3-lobed, glabrous or sparsely hairy; petiole 0.5-6 cm. long, sparsely tuberculate. Flowers solitary or several in lax, branched inflorescences; peduncle 1-10 cm. long, usually glabrous or minutely tuberculate; pedicels 2-4 mm. long, similar. Sepals obovate to spathulate, outer 3.5-4 mm. long, inner up to 5 mm. long, notched at the mucronulate apex, glabrous or sparsely pilose. Corolla yellow or white, campanulate, 6-12 mm. long, glabrous outside, pilose inside at the base. Capsule globose or conic, somewhat 4-angled, 5-6 mm. long; valves reticulately wrinkled. Seeds pubescent or glabrous, 2.5 mm. long." (Aluka)

Habitat/ecology:  In Guam, "weedy in wet localities in disturbed areas"  (Stone, 1970).  In China, "Scrub, grassy roadsides in tropical areas; 100-800 m"  (Flora of China).

Propagation:  Seed

Native range:  Africa, tropical Asia, Australia (GRIN).

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
Yap Islands
Yap (Waqab) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 227)
French Polynesia
Society Islands
Tahiti Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: J. Florence 7717 (PAP)
Adventice
Guam
Guam Island
Guam Island probably introduced
invasive
Stone, Benjamin C. (1970) (pp. 495-496)
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 227)
Japan (offshore islands)
Ogasawara (Bonin) Islands
Bonin (Ogasawara) Islands   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
New Guinea (Indonesia and Papua New Guinea)
New Guinea Island
New Guinea Island   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
invasive
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 6)
Down the road from the Yuhi Hotel, climbing over trees and other vegetation. Voucher cited: Lorence 9708 (PTBG, BNM, NY, US)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 1)
Taxon name on voucher: Merremia hederacea (Burm. s.) Hallier f.
Papua New Guinea
Bismarck Archipelago
Bismarck Archipelago   Peekel, P. G. [translated by E. E. Henty] (1984) (p. 469)
Not abundant; in lawns, hedges and Imperata grassland.
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 native
Merrill, Elmer D. (1923) (p. 361)
In thickets and in open grasslands at low 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)
Northern Territory native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia
Australia (continental)
Queensland native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Cambodia
Cambodia
Cambodia (Kingdom of)   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
China
China
China (People's Republic of)   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Scrub, grassy roadsides in tropical areas; 100-800 m. Fujian, Guangdong, Guangxi, Hainan, Jiangxi, Yunnan.
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 224)
In thickets or in grasses along roadside.
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)
Japan
Ryukyu Islands
Ryukyu Islands   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Malaysia
Malaysia
Malaysia (country of)   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Singapore
Singapore
Singapore (Republic of) native
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 60)
Common
Taiwan
Taiwan Island
Taiwan Island   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Scrub, grassy roadsides in tropical areas; 100-800 m.
Thailand
Thailand
Thailand (Kingdom of)   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of)   Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)


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This page was created on 9 NOV 2008 and was last updated on 16 MAY 2017.