Australian Tropical Rainforest Plants - Online edition

Ixora oreogena S.T.Reynolds & P.I.Forst.

Shrub (woody or herbaceous, 1-6 m tall)
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Scale bar 10mm. © CSIRO
Cotyledon stage, epigeal germination. © CSIRO
Cotyledons and 2 leaves. © CSIRO
10th leaf stage. © CSIRO

Reynolds, S.T. & Forster, P.I. (2006) Austrobaileya 7: 262. Type: Queensland, State Forest Reserve 194, Mt Baldy, 24 Jan. 2001, P.I. Forster PIF26596 & R. Booth. Holo: BRI; iso: MEL.

Common name

Ixora Bush


Usually a tree but generally less than 30 cm dbh.


Stipules about 3-5 mm long, abruptly narrowed into a fine, hair-like point. Leaf blades about 5-9 x 2-3 cm. Lateral veins forming loops well inside the blade margin. Petiole narrowly winged.


Numerous subulate glands on the inner surface of the calyx tube just below the apex. Corolla tube about 6 mm long, lobes about 3-3.5 mm long. Anthers aristate at the apex.


Fruits depressed globular, about 9-11 x 12-13 mm. Seeds about 4-6 per fruit. Testa intruding into the endosperm on one side so that the endosperm is U-shaped in transverse section. Embryo located along the outer edge of the seed. Cotyledons flat, +/- orbicular, base cordate.


Cotyledons almost orbicular, about 12-25 x 12-23 mm. At the tenth leaf stage: leaf blade narrowly elliptic or obovate, glabrous on the upper surface; stipules interpetiolar, triangular, finely acuminate at the apex. Seed germination time 55 to 91 days.

Distribution and Ecology

Endemic to NEQ. Altitudinal range from 600-1200 m. Grows as an understory tree in well developed mountain rain forest.

Ixora sp. (North Mary LA B.P. Hyland 8618), Names & Distribution of Queensland Plants, Algae & Lichens : (2002). Ixora sp. (North Mary LA BH 8618), Australian Tropical Rain Forest trees, Shrubs & Vines : (2003).
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