Australian Tropical Rainforest Plants - Online edition

Syzygium johnsonii (F.Muell.) B.Hyland

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Leaves and Flowers. © B. Gray
Fruit, side views and cross section. © W. T. Cooper
Scale bar 10mm. © CSIRO
Cotyledon stage, hypogeal germination. © CSIRO
10th leaf stage. © CSIRO

Hyland, B.P.M. (1983) Australian Journal of Botany Supplementary Series 9: 95.

Common name

Rose Satinash; Watergum; Satinash, Rose; Johnson's Satinash; Satinash, Johnson's


Outer bark generally pink or reddish brown. Adventitious roots sometimes present towards the base of the stem.


Oil dots quite large and conspicuous but somewhat sparsely distributed. Leaf blades about 5.7-11.7 x 2-7 cm. Petiole and midrib grooved or depressed on the upper surface. Crushed leaves emit a fairly strong odour, resembling mango (Mangifera indica). Lateral veins scarcely visible on the upper surface.


Bracts deciduous, absent at anthesis. Calyx tube (hypanthium) + pedicel about 3-6 mm long, calyx tube (hypanthium) about 3-5 mm diam., calyx lobes slightly dimorphic, rounded to broadly triangular, about 1.5-2 mm long. Petals +/- orbicular, about 2-2.5 mm diam., oil dots present or absent, up to five per petal. Outer staminal filaments about 5-13 mm long, anthers about 0.4-0.6 x 0.4-0.7 mm, gland terminal, conspicuous. Ovules about 10-17 per locule, placentas central, ovules radiating, ascending. Style about 8-17 mm long, approximating the stamens.


Fruits oblong, attaining about 20 x 15 mm., calyx lobes persistent, about 2 mm long, pericarp succulent. Seed solitary, about 10 x 6 mm, testa free from or only slightly adhering to the pericarp and free from the uniformly textured cotyledons. Radicle lateral, cotyledons mauve or purple when fresh, petiolate, cotyledonary stipules present.


Cataphylls about 2 pairs. At the tenth leaf stage: leaf blade obovate, apex acuminate, base attenuate, glabrous; oil dots large, visible to the naked eye. Seed germination time 29 to 48 days.

Distribution and Ecology

Endemic to Queensland, occurs in CYP, NEQ, CEQ and southwards as far as south-eastern Queensland. Altitudinal range from sea level to 1550 m. Grows in well developed rain forest on a variety of sites.

Natural History & Notes

This species occasionally produces millable logs and the timber is marketed as Rose Satinash. Wood specific gravity 0.82-0.85. Hyland (1983).

Eugenia johnsonii F.Muell., Victorian Naturalist 8: 199(1892), Type: Mount Bartle Frere, S. Johnson. holo: MEL; iso: MEL, BRI. Eugenia petriei C.T.White & W.D.Francis, Proceedins Royal society Queensland 35: 71(1923), Type: Fraser Island, W. R. Petrie; holo: BRI; iso: BO.
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