Australian Tropical Rainforest Plants - Online edition

Lasjia grandis (C.L.Gross & B.Hyland) P.H.Weston & A.R.Mast


Tree
Click/tap on images to enlarge
Flowers [not vouchered]. © G. Sankowsky
Leaves and flowers [not vouchered]. © G. Sankowsky
Scale bar 10mm. © CSIRO
© CSIRO
10th leaf stage. © CSIRO
Cotyledon stage, hypogeal germination. © CSIRO
Family

Mast, A.R., Willis, C.L., Jones, E.H., Downs, K.M. & Weston, P.H. (2008) American Journal of Botany 95(7): 865.

Common name

Satin Silky Oak; Oak, Satin Silky

Stem

Oak grain in the wood and a corresponding pattern in the inner blaze.

Leaves

Oak grain in the twigs. Leaves in whorls of 3-6. Leaf blades about 8-23 x 2-6 cm. Terminal buds densely clothed in rusty brown hairs. Small, pale lenticels usually conspicuous on the twigs.

Flowers

Flower bracts curved, about 0.5-0.6 mm long. Flowers paired, but lacking a common peduncle. Tepals sparsely pubescent on the outer surface, about 3-3.5 mm long. Hypogynous glands fused to form a cup (often 4-lobed) surrounding the base of the ovary. Ovary sessile, glabrous. Ovules 2.

Fruit

Fruits +/- globular, about 5-6 x 5-6 cm. Seed about 4 x 4 cm. Endocarp + testa about 2 mm thick. Pericarp marked by rays of radial fibres in transverse section. The rat-eaten remains of the seed coats normally present beneath mature trees.

Seedlings

First leaves usually in a whorl of three. At the tenth leaf stage: leaf blade linear-obovate, apex acute, base cuneate to obtuse, in whorls of three, upper surface hairy along the midrib. Seed germination time 14 to 22 days.

Distribution and Ecology

Endemic to NEQ, known only from a few collections made in the China Camp area and in the Barong and McNamee Logging Areas. Altitudinal range from near sea level to 450 m. Usually grows in well developed lowland rain forest.

Synonyms
Macadamia grandis C.L.Gross & B.Hyland, Australian Systematic Botany 6(4): 347(1993), Type: Queensland, State Forest Reserve 755, Barong LA [Logging Area], Gray 1586, 12 xii 1979, (holo: QRS; iso: NSW).
RFK Code
422
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