Australian Tropical Rainforest - Online edition Elattostachys xylocarpa (A.Cunn. ex F.Muell.) Radlk. Family: Radlkofer, L.A.T. (1879), Actes du Congres International de Botanistes .. Amsterdam for 1877: 112. Common name: White Stem Usually a small tree 4-10 m but recorded up to 25 m tall. Bark dark brown, smooth with horizontal ridges, branchlets and stems pubescent becoming hairless (glabrous). Leaves Leaves pinnately compound, alternate, 6-16 cm long. New growth reddish. Buds softly hairy with simple hairs. Stipules absent. Petiole 1-4 cm long. Petiolules and petioles swollen at base. Leaflets Shoot with inflorescence. CC-BY: 2-6 per leaf, alternate, terminal leaflet absent, rachis extended shortly beyond the last leaflet. Blades APII, ANBG. variable in shape, ± elliptic to oblong-obovate, 4-10.5 cm long, 1-5 cm wide, base cuneate, rounded and often asymmetric, margins entire, regularly or irregularly toothed, apex acute or obtuse. Leaflets hairy to hairless on upper surface, hairy on lower surface yellow to golden tinged. Midrib raised on the upper surface of the leaflet blade. Domatia present, conspicuous as hairy tufts in lateral vein axils. Flowers Inflorescence axillary, racemose or in panicles. Flowers unisexual and monoecious, actinomorphic. Sepals 5, fused only at the base, ovate 3-4 mm long, hairy. Petals 5, free, ovate or Flowers. CC-BY: APII, ANBG. subhastate, glabrous except for villous recurved scales, 2.5-5 mm long, pinkish white. Male flowers with 8 stamens (exserted) and a rudimentary ovary present. Female flowers with usually 8 staminodes (on short filaments and not exserted). Ovary superior, locules 3. Fruit Fruit a capsule, obovoid or ellipsoidal, 3-valved, grooved at sutures, dry when mature, 15-20 mm long, 15-22 mm diam. Mature fruit yellow-green outside, pink-purplish inside, sparsely hairy outside, valves thick and woody. Seed black 6-8 mm long, 1 per locule; aril white to purple-pink, with two Leaflets. CC-BY: APII, ANBG. broad arms on either side of seed. Seedlings Features not available. Distribution and Ecology Occurs in NEQ from near Ingham southwards to Grafton in NSW in dry rainforest and vine thicket communities. Natural History & Notes Domatia. CC-BY: APII, ANBG. Elattostachys bidwillii is treated as a synonym here following the Australian Plant Census (CHAH 2006). The Queensland Herbarium recognises E. xylocarpa as a separate species to E. bidwillii, distinguished from the latter by the distinctly hairy lower leaflet surface, shorter leaflets and with regularly to irregularly toothed margins. This profile information and associated coding has been adapted from Cooper & Cooper (2004), Harden et al. (2014) and Reynolds (1984). Synonyms Cupania xylocarpa A.Cunn. ex F.Muell., Transactions of the Philosophical Institute of Victoria 3: 27 (1859), Type: "On various parts of the east coast of Australia." Cupania xylocarpa A.Cunn. ex Immature fruits. CC-BY: APII, F.Muell. var. xylocarpa, Handbook of the Flora of New South Wales: 91, (1893). Cupania ANBG. bidwillii Benth., Flora Australiensis 1: 460, (1863), Type: "Queensland. Wide Bay, Bidwill." Elattostachys bidwillii (Benth.) Radlk., Actes du Congres International de Botanistes .. Amsterdam for 1877: 112 (1879). RFK Code 1220 Copyright © CSIRO 2020, all rights reserved. Dehiscing capsule. CC-BY: APII, ANBG.

Fruit. © G. Sankowsky

Fruit. © G. Sankowsky

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