Etlingera australasica

Family

Zingiberaceae

Botanical Name

Etlingera australasica (R.M.Sm.) R.M.Sm.

Smith, R.M. (1986) Notes from the Royal Botanic Gardens, Edinburg 43: 243. Type: ?.

Synonyms

Achasma australasicum R.M.Sm., Notes from the Royal Botanic Garden, Edinburgh 38: 517(1980), Type: Queensland, Claudie River, 12 45 S, 143 25 E, 22 Oct. 1973, Irvine 700; holo: QRS.

Stem

Usually flowers and fruits as a shrubby plant about 2-4 m tall but it should be noted that only the leaves are above ground level. The true stem is below the soil surface.

Leaves

Leaf blades shortly petiolate, about 40-60 x 6-12 cm, glabrous, ligule to 2 cm long, margin ciliate, apex truncate or obtuse.

Flowers

Inflorescences produced on long or short peduncles surrounded by sterile bracts. Inflorescences produced some distance from the base of leafy shoots, it is not always obvious that the inflorescence in fact belongs to that particular plant. Inflorescence up to 8 x 2.5 cm, at least partially subterranean, flowers about 4-6 per inflorescence, sterile bracts pubescent, up to 5 x 2.5 cm, fertile bracts lanceolate, about 4-6 cm long. Bracteoles to 5 cm long, pubescent. Calyx to 7 cm long, shortly 3-dentate, pubescent. Corolla tube about 7 cm long, lobes about 2-2.5 cm long. Labellum to 7 cm long, connate to the filament in lower 1 cm, obscurely 3-lobed. Anther about 10-13 mm long, free filament about 2-3 mm long. Ovary about 10-13 mm long, pubescent.

Fruit

Fruits ovoid or globular, about 3-4 x 2-3 cm, +/- subterranean. Seeds about 4-5 x 3-4 mm. Testa rugose. Embryo straight, about 3 mm long, immersed in hard endosperm.

Seedlings

First true leaf glabrous, lanceolate, sessile or shortly petiolate (?) At the tenth leaf stage: leaves broadly lanceolate, glabrous, shortly petiolate. Sheathing leaf base mainly glabrous except for the ciliate margins, ligule mainly glabrous except for the ciliate margin.

Distribution and Ecology

Endemic to Queensland, occurs in CYP and NEQ. Altitudinal range from near sea level to 450 m. Grows in disturbed areas in lowland and upland rain forest.