Xanthostemon chrysanthus—Golden Penda, River Penda, Johnstone River Penda—MYRTACEAE.

Xanthostemon chrysanthus

Link to Images on Flickr.

Habitat—Usually grows as a rheophyte along creeks and watercourses in open forest and rain forest. In the McIlwraith Ranges, this species is found in well developed upland rainforest away from watercourses.

Distribution— Endemic to Queensland, occurs in Cape York Penninsula and North East Queensland. Altitudinal range from near sea level to 600 m.

Description—Frequently found on creek banks where it is gnarled and poorly formed but developing into a well formed tree in other situations.

Local occurrences

Forster Cemetery, Forster/Tuncurry Streets and Royal Botanic Gardens Sydney

Leaves.— Simple, opposite, intramarginal vein, entire, oil dots present; leaf blade elliptic to obovate, apex acute, base attenuate, hairy on the upper surface; small brown oil dots numerous, visible with a lens; petiole, stem and terminal bud clothed in long, pale hairs.

Xanthostemon chrysanthus
Xanthostemon chrysanthus

Inflorescence.—Calyx tube (hypanthium) glabrous, about 5 to 6 x 5 to 6 mm, lobes variable, one much larger than the rest, but most about 2 to 3 mm long, greenish, marked by pink or reddish oil glands. Petals glabrous, cordate or triangular, about 7 to 8 mm long, marked by pink or orange oil dots. Staminal filaments bright yellow, about 30 mm long, each inserted in an orifice in the base of the anther, anthers about 1.5 mm long. Ovary surrounded by the calyx tube (hypanthium), but not completely enveloped in it. Ovary glabrous, about 3 to 3.5 mm diam., green, marked by numerous oil glands. Placentas peltate. Style yellow, about 40 to 45 mm long. Stigma small and terminal.


Fruit.—Flobular or depressed globular, about 12 to 14 mm diam., calyx persistent at the base. Seeds flat, about 3 to 4 mm diam. Embryo ± orbicular, about 3 mm diam. Radicle curved


Xanthostemon chrysanthus