PNGTreesKey – Mastixiodendron smithii Merr. & L.M.Perry
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
Journal of the Arnold Arboretum Vol. 26: 255 (1945)
Timber Group: Non-timber species
Field Characters: Large canopy tree (up to 40 m high) or Small sub-canopy tree; Bole cylindrical (up to c. 100 cm diam.); straight (bole up to c. 20 m long); buttresses buttresses present (buttresses up to c. 3 m high, rarely to 4 m.); spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark pale brown or dark grey, rough, scaly or flaky; Subrhytidome (under-bark) green; less than 25 mm thick; bark blaze consisting of one layer; almost strongly aromatic or faintly to non-aromatic; pleasant (fruit-like); outer blaze white or yellow (pale (straw-coloured), markings absent, fibrous; inner blaze white or yellow (pale (straw-coloured), markings absent, fibrous; bark exudate (sap) present, colourless, not readily flowing (spotty), colour changing on exposure to air, to green, not sticky or sticky; terminal buds enclosed by leaves.
Indumentum: Complex hairs absent; stinging hairs absent; mature twig indumentum (hairs) absent.
Leaves: Leaves spaced along branches, opposite (in pairs, opposite one another on the branchlet), simple (a leaf composed of a single blade); petiole present, not winged or winged (slightly (with lamina slightly extended down petiole), attached to base of leaf blade, not swollen or slightly swollen; leaves broadest at or near middle, 11.0-20.0 (-36.0) cm, 4.0-10.0 (-20.0) cm; symmetric, entire, not dissected or lobed, obtuse, venation pinnate, secondary veins open, not prominent, but visible, intramarginal veins absent; leaves lower surface pale green, upper surface dark green (glossy), indumentum (hairs) absent; absent; domatia absent; stipules present, joined, joined across twigs (slightly twisted), not encircling the twig or almost encircling the twig, leafy, not fringed, large (18-35 mm long), not persistent.
Flowers: Inflorescence axillary, flowers on a branched axis, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, (6.0-) 9.0-12.0 mm long, diameter small (up to10 mm diam.) (5-10 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth green (yellowish (towards base) or pale yellow; 4, free; stamens 4, present, free of each other, free of the perianth; ovary inferior, carpels joined (when more than one); styles solitary, 1.
Fruits: Infrutescence arranged on branched axis, fruit 35.0-50.0 (-70.0) mm long, 12.0-25.0 (-30.0) mm diam., green (probably immature), not spiny, fleshy, simple, indehiscent, drupe; seeds 1, much more than 10 mm long (20-25 mm long), not winged, narrow (longer than wide), seed 1-10 mm diam. (c. 10 mm diam.).
Distribution: Morobe, Eastern Highlands, Southern Highlands, Central & Northern.
in PNGplants database