PNGTreesKey – Dysoxylum setosum (Span.) Miq.


Barry Conn (NSW) & Kipiro Damas (LAE).
Guide to trees of Papua New Guinea
Copyright held by the authors, National Herbarium of New South Wales, and Papua New Guinea National Herbarium

Dysoxylum setosum (Span.) Miq.

Annales Musei Botanici Lugduno-Batavi Vol. 4: 13 (1868)

Other Literature: D.J. Mabberley & A.M. Sing, Flora Malesiana, Series 1 74-76 (1995)

Family: Meliaceae

Timber Group: Minor hardwood

Field Characters: Large canopy tree (up to 30 m high); Bole cylindrical (up to c. 50 cm diam.); straight; buttresses buttresses present (buttresses up to 20 cm high); spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark grey or brown, rough, fissured; less than 25 mm thick; bark blaze consisting of one layer; faintly to non-aromatic; outer blaze brown, markings absent; inner blaze brown, markings absent; bark exudate (sap) present, white/milky, not readily flowing (spotty), colour not changing on exposure to air, not sticky; terminal buds not enclosed by leaves.

Indumentum: Complex hairs absent; stinging hairs absent; mature twig indumentum (hairs) present or absent, hairs sparse.

Leaves: Leaves spaced along branches, spiral (leaves occurring singly at a node and arranged spirally up the branchlet), compound (a leaf made up from two or more leaflets); petiole present, not winged, attached to base of leaf blade, not swollen; leaves pinnate (unbranched with more than three leaflets); petiolule not swollen; rachis present, absent, absent; leaves without a terminal leaflet (the number of leaflets even - paripinnate), broadest at or near middle, 10.0-15.0 (-28.0) cm, 5.0-8.0 (-10.0) cm, symmetric; venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface green, upper surface dark green, indumentum (hairs) absent or present, indumentum (hairs) sparse; absent; domatia absent; stipules absent.

Flowers: Inflorescence axillary (to supra-axillary), flowers on a branched axis, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, 7.0-10.0 mm long, diameter small (up to10 mm diam.) (4-6 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth white, pale yellow, or cream-coloured; (4-) 5 (-6), some or partly joined; stamens 10 (-12), absent, joined (to form a staminal tube), free of the perianth; ovary superior, carpels joined (when more than one), locules (4-) 5 (-6); styles solitary, 1.

Fruits: Infrutescence arranged on branched axis, fruit 25.0-30.0 mm long, yellow or brown, not spiny, non-fleshy, simple, dehiscent, capsule; seeds (4-) 5-10 (-12), about 10 mm long, not winged, narrow (longer than wide), seed 1-10 mm diam. (c. 5 mm diam.).

Distribution: Morobe, Gulf & Central.

Dysoxylum setosum
Botanical records
in PNGplants database

Map details