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Flora of Australia Online

Eidothea zoexylocarya A.W.Douglas & B.Hyland, Fl. Australia 16: 473 (1995)

T: Timber Reserve 1230, Boonjee Logging Area, Mt Bartle Frere, Qld, 9 Jan. 1980, B.Gray 1611; holo: QRS; iso: BRI, CANB, DNA, HO, K, L, LSU, MEL, MO, NSW, PERTH, PRE, QRS.

Tree 20–40 m tall; trunk 40–80 cm diam. Wood pinkish internally, with broad rays. Leaves with petiole c. 1–3 cm long, semiterete at base, somewhat thickened and flattened distally; lamina elliptic to ovate, 6–10 cm long, glabrous; margin entire, recurved; venation loosely brochidodromous to eucamptodromous. Inflorescence 6–10-flowered, 1.5–2 cm long. Tepals 6–7 mm long, ivory, with long trichomes on inside attached at base, otherwise glabrous. Stamens longer than tepals, 7.5–9 mm long, ivory; anthers pendulous, ivory. Gynoecium 4–5 mm long, ivory. Fruit 3.5–6 cm long, 3–6.5 cm diam., green. Fig. 46.

Mt Bartle Frere and the Pieter Botte Logging Area on the Bloomfield River watershed, north-eastern Qld. Apparently confined to rainforest. Flowers Sept.–Apr.; fruits Mar.–May. Map 119.

Qld: Mt Bartle Frere, B.Gray 817 , 818 (QRS); Timber Reserve 755, Coolamon Logging Area, B.P.M.Hyland 25797/RFK (QRS); Thornton Peak, J.G.Tracey 14994 (QRS); Timber Reserve, Pieter Botte Logging Area, B.P.M.Hyland 3505/RFK (QRS).

There is pronounced variation in leaf venation patterns. Most leaves have loosely brochidodromous and/or eucamptodromous venation with a single primary vein; there can also be variation in the same leaf. Some, however, have 3 veins, originating within the petiole, which subsequently diverge in the lamina to resemble an acrodromous pattern sensu L.J.Hickey (Amer. J. Bot. 60: 17–33, 1973).

The fruit of E. zoexylocarya appear to be predated on the tree and probably also on the ground by a small mammal (probably the White-tailed Rat, Uromys ). The hollowed nut endocarps are often found surrounding the base of the mother tree and vary in size. The range of variation in endocarp size appears to be greater on a single plant from one year to another, than it does among trees in different populations. A recent survey found numerous fruit and seedlings in the Boonjee Logging Area.

The nut is remarkably similar to the fossilised nut of Xylocaryon lockii F.Muell. from Victoria (F.J.H. von Mueller, Observations on new vegetable fossils of the auriferous drifts, Geologic Survey of Victoria , 1883, Douglas, in prep.).

The flowers have a subtle, sweet perfume and hovering insects appear to dart in and out of inflorescences of mature trees.

The number of populations of this plant appears low. Until a complete assessment has been made its conservation status should be considered to be at least vulnerable if not endangered.

(A.W.Douglas, B.P.M.Hyland)

 

Data derived from Flora of Australia Volumes 16 (1995), 17A (2000) and 17B (1999), products of ABRS, ©Commonwealth of Australia