Australian Tropical Rainforest Plants - Online edition

Hollandaea porphyrocarpa A.J.Ford & P.H.Weston

Shrub (woody or herbaceous, 1-6 m tall)
Click/tap on images to enlarge
Flowers and bud. © Barry Jago
Ramiflorous flowers. © B. Gray
Ramiflorous flowers. © Stanley Breeden
Fruit, side view, dehiscing and seed. © W. T. Cooper
Scale bar 10mm. © CSIRO
10th leaf stage, cotyledons still attached, hypogeal germination. © CSIRO
10th leaf stage. © CSIRO
Cotyledon and 1st leaf stage, hypogeal germination. © CSIRO

Smith, L.S. (1956) Proceedings of the Royal Society of Queensland 67: 38.

Common name

Sayer's Silky Oak


Seldom exceeding 30 cm dbh. Oak grain in the wood and a corresponding pattern in the inner blaze.


Oak grain in the twigs. Leaf blades usually rather large, about 10-22 x 6-14 cm. Petioles somewhat swollen at their junction with the twig. Scattered peg-like teeth on the margin of the leaf blade.


Flowers pedicellate, common peduncle nil or very short. Tepals about 20-30 mm long. Hypogynous glands four, scutelliform. Ovary sessile, ovules about 12-16.


Fruits allantoid to somewhat cylindrical, about 8-10 cm long, with a solitary rib on one side. Seeds +/- quadrangular in transverse section, about 2.5-3 x 2-2.5 cm. Testa thin and papery.


At the tenth leaf stage: leaf blade elliptic to obovate, margin serrate, teeth evenly spaced along the leaf blade margin, upper surface may have a few hairs along the midrib. Seed germination time 65 to 91 days.

Distribution and Ecology

Endemic to NEQ, restricted to the area around the Bellenden Ker Range and Mt Bartle Frere and the eastern edge of the Atherton Tableland. Altitudinal range from sea level to 800 m. Grows as an understory tree in well developed lowland and upland rain forest.

Natural History & Notes

An attractive small tree with potential for parks and home gardens. The long racemes of pink or purple flowers provide a striking effect.

Hollandaea sayeri F.Muell., The Chemist and Druggist of Australasia 2 : 173(1887). Helicia sayeriana F.Muell., The Victorian Naturalist 3: 93(1887), Type: On the Russell-River; W. Sayer.
RFK Code
Copyright © CSIRO 2020, all rights reserved.