Australian Tropical Rainforest Plants - Online edition

Beilschmiedia volckii B.Hyland

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Fruit, side views, cross section and seed. © W. T. Cooper
Scale bar 10mm. © CSIRO
Habit, flower, stamen, staminode, fruit, seedling. © CSIRO
Flower, side view, hairy (papillose) tepals, anthers & style. © CSIRO
Flower, bird's-eye view, tepals, anthers (6), staminodes & style. © CSIRO
10th leaf stage. © CSIRO
Cotyledon and 1st leaf stage, hypogeal germination. © CSIRO
Cotyledon and 1st leaf stage, hypogeal germination. © CSIRO
Cotyledon stage, hypogeal germination. © CSIRO

Hyland, B.P.M. (1989) Australian Systematic Botany 2: 156. Type: A.K. Irvine 464, Boonjee, Timber Reserve 1230, 15.ii.1973 (QRS, holotypus).

Common name

Blush Walnut; Walnut, Blush; Walnut, Boonjee Blush; Boonjee Blush Walnut


A thin cream or pale brown layer generally visible beneath the subrhytidome layer before the first section of the outer blaze.


Twigs +/- terete, clothed in straight, appressed, pale brown hairs when young but almost glabrous when older. Leaf blades about 12-27 x 6.5-11 cm, green and glabrous on the underside, clothed in straight, appressed, pale brown hairs only when young. Midrib pale, +/- translucent, slightly depressed or flush with the upper surface. Petioles flat on the upper surface. Oil dots visible with a lens. Pale brown lenticels usually obvious on the leaf bearing twigs.


Tepals about 0.7-1.3 mm long. Stamens six. Staminodes six, dimorphic and hairy, but not differentiated into heads and filaments. Ovary glabrous, +/- sessile.


Fruits about 45-67 x 43-65 mm. Cotyledons burgundy in colour.


At the tenth leaf stage: leaf blade glaucous on the underside; oil dots numerous, very small, visible only with a lens; petiole clothed in numerous short prostrate inconspicuous hairs. Seed germination time 17 to 66 days.

Distribution and Ecology

Endemic to NEQ, known only from collections made on the edge of the Atherton Tableland in the Johnstone River valley and a collection from north of the Daintree River. Altitudinal range from 150-700 m. Grows in well developed lowland and upland rain forest.

Natural History & Notes

Flesh of fallen fruit eaten by Musky Rat-kangaroos. Cooper & Cooper (1994). This species produces millable logs and the sawn timber is of high quality and is marketed as Boonjee Blush Walnut, a useful cabinet and general purpose timber. Wood specific gravity 0.53-0.56. Hyland (1989).

RFK Code
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