Cryptocarya obovata

Cryptocarya obovata
Cryptocarya obovata at the Royal Botanic Gardens, Sydney
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Magnoliids
Order:	Laurales
Family:	Lauraceae
Genus:	Cryptocarya
Species:	C. obovata
Binomial name
Cryptocarya obovata R. Br.

Cryptocarya obovata is a large laurel growing on basaltic and fertile alluvial soils in eastern Australian rainforests. It is found from Wyong (33° S) in New South Wales to Gympie (27° S) in the state of Queensland. Extinct in the Illawarra region (34° S), seen in the Illawarra in 1818 by Allan Cunningham^[1]. Published in Prodromus Florae Novae Hollandiae et Insulae Van Diemen, 402 (1810)

Description

Cryptocarya obovata, known as the Pepperberry or White Walnut reaches a height of 40 metres and a trunk diameter of 90 cm. The hairy underside of the leaves gives a rusty appearance of the tree, when viewed from below.

Trunk, bark & leaves

The trunk is straight and round in cross section, usually buttressed. The bark is grey or brown and usually fairly smooth. Vertical lines of pustules are often seen.

Leaves are alternate, obovate or oblong, 6 to 12 cm long, with a round tip. Upper surface smooth and glossy, underside usually greyish and finely hairy. Brown leaf stalks 3 to 8 mm long.

Leaf venation is prominent, the raised midrib, lateral and net veins are covered with brown hairs, standing out conspicuously. Veins brownish/orange or yellow in colour.

drawing by Margaret Flockton

Flowers, fruit & germination

Cream flowers in panicles. Individual flowers about 3 mm long, almost without stalks. Flowering occurs between February to May.

The fruit is a black globular drupe, usually ribbed. 12 mm in diameter. The seed is around 8 mm in diameter. Fruit ripe from March to May. Eaten by Australasian Figbird, Rose-crowned Fruit-dove, Topknot Pigeon and Wompoo Fruit Dove.

Like most Australian Cryptocarya fruit, removal of the fleshy aril is advised to assist seed germination, which is slow with Cryptocarya obovata After 205 days, a 50% germination success may be expected.

Gallery

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  Cryptocarya obovata at the Royal Botanic Gardens, Sydney

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  Cryptocarya obovata - bark

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  Cryptocarya obovata - juvenile

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  Cryptocarya obovata - leaves showing venation

References

1. ^ "Plants at risk in the Illawarra region; by Anders Bofeldt". Landcare Illawarra. http://www.landcareillawarra.org.au/wp-content/uploads/Table-1.-Plants-at-risk-in-the-Illawarra-region.pdf. Retrieved 2011-10-25. 

• Floyd, A.G., Rainforest Trees of Mainland South-eastern Australia, Inkata Press 1989, ISBN 0-909605-57-2