Siphonodon australis—Ivorywood—CELASTRACEAE

Siphonodon australis

Link to Images on Flickr.

Habitat—Grows in Dry, Subtropical and Monsoon Rainforest.

Distribution— Endemic to Australia, north from Mallanganee(West of Casino)in New South Wales to the Cape York Peninsula in Queensland. Altitudinal range from sea level to 900 meters.

Description—Medium sized tree.

Local occurrences

Raintrees Diamond Beach

Leaves.—Simple, alternate, entire (slightly crenate or serrate). Leaves hairless, rather thick and leathery, obovate, narrow–obovate or elliptic, very obtuse or bluntly pointed, 5 to 13 cm long, tapered to the short petiole, glossy above, paler green below. Lateral veins few, 5 to 8 pairs. Branches with a slight zig zag.

Siphonodon australis
Siphonodon australis

Inflorescence.— About 10 to 20 mm long, shorter than the leaves, 1 to 3 flowered, pedicels about 8 to 10 mm long. Sepals ± semicircular, about 1.5 to 3 mm long. Petals nearly orbicular, about 6.5 to 8 mm. Anther filaments about 1.5 by 1.5 mm, as wide or wider than the anthers. Disk enclosing the ovary and surrounding the style which is located in a well in the disk. Stigma ± level with the disk. Yellowish Green in colour


Fruit.—Globular, obovoid or depressed globular, about 25 to 40 mm long, fleshy. Seeds immersed in the granular pericarp, each surrounded by a very hard endocarp. Seeds about 6 by 2.5 mm. Yellow.


Siphonodon australis