Australian Tropical Rainforest Plants - Online edition

Argyrodendron sp. Penta Tulip Oak (B.Hyland 2565RFK)

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Habit, flower, fruit, lepidote scale, seedling. © CSIRO
Cotyledon and 1st leaf stage, epigeal germination. © CSIRO
1st leaf stage, epigeal germination. © CSIRO
10th leaf stage. © CSIRO
Scale bar 10mm. © CSIRO

Provisional HISPID phrase name.

Common name

Tulip Oak; Wet Tulip Oak


Bark quite hard to cut and blaze layering very fine. Fine ray pattern in the inner blaze.


Leaflets brown to grey-brown on the lower surface. Leaflet blades about 6.5-14.5 x 2.4-5.5 cm. Lateral veins curved throughout their length, but not forming definite loops, midrib raised on the upper surface. Numerous scales visible with a lens on the lower surface of the leaflet blade. Pores in the twig pith normally visible to the naked eye. Twig bark strong and fibrous when stripped.


Outer surface of the flower buds clothed in stellate hairs and scales. Flowers about 13-16 mm diam. Inner surface of the perianth tube mainly free of stellate hairs and scales. Anthers about 15 per flower.


Basal, i.e. globular part of the fruiting carpel +/- smooth, clothed in dark brown scales. Fruiting carpel + wing about 8-10 cm long.


Cotyledons fleshy, about 9 x 7-8 mm, venation not visible. First pair of leaves lanceolate, lower surface brown from scales. At the tenth leaf stage: compound leaf with 4 or 5 leaflets. Leaflet blades glabrous, about 55-100 x 17-32 mm, and midrib raised on the upper surface, lower surface brown from scales; stipules linear-triangular, about 7 mm long, clothed in brown scales. Terminal bud clothed in scales. Seed germination time 24 to 26 days.

Distribution and Ecology

Probably endemic to NEQ, restricted to the area between Cooktown and the Atherton Tableland. Altitudinal range from 300-1200 m. Grows in well developed rain forest on a variety of sites.

RFK Code
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