Australian Tropical Rainforest Plants - Online edition

Denhamia peninsularis J.J.Halford & Jessup

Shrub (woody or herbaceous, 1-6 m tall)
Click/tap on images to enlarge
Scale bar 10mm. © CSIRO
10th leaf stage. © CSIRO
Cotyledon stage, epigeal germination. © CSIRO

 Halford, J.J. & Jessup, L.W. (2020) Austrobaileya 10(4): 598-600. Type: "Queensland. COOK DISTRICT: 16.8 km NE of Heathlands by road, 29 February 1992, J.R. Clarkson 9256 & V.J. Neldner (holo: BRI; iso: K)."


Shrub or small tree to 5 m tall, trunk mottled grey.


Leaf blades glabrous, about 3-9 x 1.1-3.7 cm, margins serrate to serrulate. Lateral veins not forming distinct loops inside the blade margin, 8-14 pairs; apex mucronate to obtuse. Reticulate veins quite prominent and raised on surface. Petiole quite short, about 1.5-4 mm long, +/- ridged on the upper surface, glabrous.


Inflorescence a many flowered cyme. Flowers 5-merous. Sepals rounded to ovate, and concave, entire or erose, 1-1.5 mm long. Petals oblong-obovate to rounded, concave, 2.5-4 mm long, cream to pale yellow. Staminal filaments 1.2-1.8 mm long, fused near the base forming a ring around the ovary. Ovary mostly exposed above the disk, imperfectly 3 (rarely 2-4)-locular with 2-4 ovules per locule. Style about 1.2-1.7 mm long. Stigma very shortly 3-lobed at the apex.


Fruit a capsule, 1.6-2.5 long when mature and  to 1.4 cm wide prior to dehiscence, ripening yellow to orange, valves woody, 1-2 mm thick. Seeds about 3-6 x 3-4 mm mostly completely enclosed in the large fleshy aril. Cotyledons more or less orbicular, much wider than the short radicle.


Cotyledons elliptical, about 15-20 x 9-10 mm, petiole very short. First pair of leaves with sparsely toothed margins. At the tenth leaf stage: leaf blade margins dentate-crenate with 1 or 2 teeth on either side. Stipules small and inconspicuous. Bark on the taproot orange in colour. Seed germination time 23 days.

Distribution and Ecology

Endemic to CYP. Occurs at low altitude. Grows in dense shrublands or low forests as heaths, or simple notophyll vine forests and semi-deciduous microphyll vine thickets in coastal or riparian vegetation.

Denhamia sp. Jardine River (B.P.Hyland 10250) [Provisional HISPID Phrase Name].
RFK Code
Copyright © CSIRO 2020, all rights reserved.