Planchonia careya (F.Muell.) R.Knuth
Knuth, R. (1939) Das Pflanzenreich Heft 105(1) : 56.
Cocky Apple; Cockatoo Apple; Billy Goat Plum; Apple, Cocky; Apple, Cockatoo; Plum, Billy Goat
Papery (papyraceous), glabrous, discolorous, glossy above, dull on lower surface, aging red; obovate to broadly ovate, the smallest leaves spathulate, 50-120 x 28-76 mm; apex emarginate to bluntly acuminate, tip obtuse; finely crenulate or sometimes almost entuire; base long attenuate; midrib flat above; lateral nerves in 9-12 pairs, forming indistinct loops inside the blade margin, angled at 60 degress to midrib; petiole 6-32 mm long.
Racemes with few, large flowers; pedicels puberulous, 5-20 mm long. Calyx tube green, 7-15 mm long; largest lobes 6-11 x 4-8 mm, the smallest 4-6 x 3-4.5 mm. Petals white, pink at the base, greenish on the back, 15-32 x 6-14 mm. Staminal tube 4-11 mm long; filaments ca. (90)120-170 per flower, 25-45 mm long. Style 35-70 mm long.
Cotyledons linear-elliptic, about 5-15 mm long. At the tenth leaf stage: leaves +/- obovate, apex obtuse, base attenuate, margin crenate and undulate, leaf blade about 50-70 x 20-30 mm; midrib raised on the upper surface; stipules small and inconspicuous; petiole narrowly winged, the wings extending down the stem to the next leaf. Hypocotyl swollen, +/- carrot-like (Daucus carota). Seed germination time 10 to 13 days.
The bark of this species is a well known fish poison in North East Queensland.
Food plant for the larval stages of the Copper Jewel and Common Tit Butterfly. Common & Waterhouse (1981).
This species has been used as a fish poison. It may also have medicinal properties. The fruit has been reported as edible. (http://www.sgapqld.org.au/bushtucker4.html)
The bark of this tree contains saponin, a chemical which makes a soap-like froth when boiled in, or shaken with, water. Cribb (1981).