Australian Tropical Rainforest Plants - Online edition

Syzygium alatoramulum B.Hyland

Shrub (woody or herbaceous, 1-6 m tall)
Click/tap on images to enlarge
Leaves, flowers and winged stem. © CSIRO
Flowers [not vouchered]. © G. Sankowsky
Scale bar 10mm. © CSIRO
Habit, flower & bud, anther, fruit, seedling. © CSIRO
10th leaf stage. © CSIRO
Cotyledon stage, hypogeal germination. © CSIRO

Hyland, B.P.M. (1983) Australian Journal of Botany Supplementary Series 9: 42. Type: B. Hyland 5564: State Forest Reserve 144, 6.x.1971; holo: QRS.

Common name

Tinkling Satinash; Satinash, Tinkling


Frequently a poorly formed tree.


Leafy twigs conspicuously 4-winged, two pockets being formed by the amalgamation of pairs of wings above each pair of leaves. Leaf blades about 7-14 x 2.5-4.5 cm. Petioles short. Midrib and main lateral veins depressed on the upper surface. Two intramarginal veins usually present, the outer one rather indistinct. Oil dots very numerous.


Bracts subulate, about 1.5 x 0.2 mm, persistent till anthesis. Calyx tube (hypanthium) gradually tapering into the pedicel, calyx tube (hypanthium) + pedicel about 3-4 mm long, tube (hypanthium) about 2-3 mm diam. Calyx lobes very broadly triangular, about 0.2-0.3 mm long. Petals orbicular, about 1.5 mm diam., oil dots about 10-50 per petal. Outer staminal filaments about 4-5.5 mm long, anthers about 0.3 x 0.4 mm, gland terminal, well developed. Ovules about 5-8 per locule, placentas central, ovules radiating. Style about 5.5-7 mm long, approximating or exceeding the stamens.


Fruits globular to depressed globular, variable in size, attaining about 12-15 mm diam. Calyx lobes small and inconspicuous, about 0.2-0.3 mm long. Seeds about 5-6 mm diam., testa slightly adhering to the succulent pericarp and easily separating from the uniformly textured cotyledons. Radicle central or basal, cotyledons purplish when fresh, cotyledonary stipules present.


Cataphylls about 2 or 3 pairs. At the tenth leaf stage: leaf blade obovate, glabrous; oil dots easily visible with a lens; stem distinctly 4-winged. Seed germination time 11 to 253 days.

Distribution and Ecology

Endemic to NEQ, known only from the area between the Windsor Tableland and Mt Bartle Frere. Altitudinal range from 50-1000 m. Grows along perennial creeks in well developed rain forest on a variety of sites.

Natural History & Notes

Generally a small, poorly formed tree, producing timber of no commercial value.

Wood specific gravity 0.69. Hyland (1983).

RFK Code
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