Pacific Island Ecosystems at Risk (PIER)

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Merremia pacifica
Ooststr., Convolvulaceae
No images for this taxon


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Fijian: veliyawa

Kwara‘ae: kwalo tabui, kwalo tambui

Habit:  vine

Description:  "High-climbing vine with fistulose stems...; leaf blades broadly ovate to orbicular, 10-14 cm long and broad, broadly cordate at base, abruptly acuminate at apex; inflorescences 12-40 cm long, the pedicels 2-3.5 cm long, with a thickened, undulate annulus at apex; sepals obovate to suborbicular, 8-12 mm long, accrescent to 18 mm long in fruit; corolla campanulate to hypocrateriform, 3-5 cm long, white with a yellow center; anthers about 2.5 mm long; fruit ovoid to subglobose, about 2 cm in diameter"  (Smith, 1991; pp. 50-51).

Main diagnostic features of the common weedy species of Merremia found in the Solomon Islands (from Bacon, 1982):

 

M. peltata

M. pacifica

M. bracteata

Leaf shape peltate sagittate sagittate
Leaf indumentum glabrous pubescent when young, glabrous when mature densely pubescent when mature
Leaf texture smooth rugose smooth
Flower bracts absent absent large and numerous
Flower colour creamy white* pure white yellow
Anthers spirally twisting at dehiscence not spirally twisting at dehiscence spirally twisting at dehiscence

*M. peltata also has a yellow-flowered form.

Habitat/ecology:  In Fiji, "infrequent in sometimes dense forest at elevations of 100-400 m" (Smith, 1991; pp. 50-51).

Propagation:  Seed

Native range:  "Louisiade Archipelago and several islands of the Solomons, where it is abundant, as well as Fiji, where it seems to be infrequent" (Smith, 1991; pp. 50-51).

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
Pohnpei Islands
Pohnpei Island native
Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 81)
Vouchers cited: E. Albert 66 (NY, PTBG), E. Albert 92 (NY, PTBG)
Native but invasive.
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2004) (voucher ID: PTBG 43705)
Taxon name on voucher: Merremia pacifica
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 43706)
Taxon name on voucher: Merremia pacifica
Fiji
Fiji Islands
Viti Levu Island native
Smith, Albert C. (1991) (pp. 50-52)
Voucher cited: DA 13194
Papua New Guinea
Bougainville Islands
Bougainville Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Louisiade
Solomon Islands
Solomon Islands
Solomon Islands native
Smith, Albert C. (1991) (pp. 50-52)
A weedy native species.
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 91)
Vanuatu
New Hebrides Islands
Vanuatu (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)

Comments:  "In the Solomons it can be a troublesome weed in forests" (Smith, 1991; pp. 50-51).


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This page was created on 18 AUG 2002 and was last updated on 19 OCT 2006.