Pacific Island Ecosystems at Risk (PIER)

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Grewia truncata
Mast, Malvaceae
No images for this taxon

Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Grewia retusa Chiov.

Habit:  shrub/tree

Description:  "Shrub or small tree up to 6 m. tall, with pubescent branchlets. Leaf-lamina 4-18 x 3-10 cm., oblong or obovate-oblong, retuse or truncate at the apex with the midrib often produced as a short mucro, margin crenate-dentate, rounded and often asymmetric at the base, glabrescent above, softly pubescent below; petiole up to 8 mm. long, pubescent; stipules c. 6 mm. long, lanceolate-acuminate, dorsally keeled, pubescent. Inflorescences opposite the leaves, 3-9-flowered; peduncles pubescent, very short; pedicels c. 15 mm. long, pubescent; bracts similar to the stipules, c. 07 cm. long. Sepals 15-25 cm. long, linear-oblong with a thickened and swollen apex, green and tomentellous outside, white and glabrous inside. Petals white, 10-16 mm. long with an ovate acute lamina much wider than the nectariferous claw which is circumvillous within ledged above and up to 2 mm. long. Androgynophore with a glabrous lower portion up to 2 mm. long and a pubescent elongation above 25-3 mm. long. Ovary 4-lobed, setulose-pubescent; style c. 1 cm. long, glabrous; stigma-lobes broad. Fruit c. 15 cm. in diameter, deeply 4-lobed, with the lobes somewhat conical and sparsely and minutely tuberculate-setulose"  (Flora Zambesiaca online)

Habitat/ecology:  In its native habitat, "riverine species, sometimes thicket-forming"  (Flora Zambesiaca online)

Propagation:  Seed

Native range:  Tropical Africa (GRIN).


Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
Lau, Alex/Frohlich, Danielle (2013) (p. 11)
Rare in cultivatation. Voucher cited: D. Frohlich & A. Lau 2012031204 (BISH)

Control:  If you know of control methods for Grewia truncata, please let us know.

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This page was created on 10 JUL 2013 and was last updated on 6 AUG 2013.