PNGTreesKey – Nauclea orientalis L.
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
Species Plantarum, edition 2 243 (1762)
Timber Group: Commercial hardwood
Field Characters: Small sub-canopy tree (up to c. 20 m high); Bole cylindrical; slightly crooked or straight; buttresses buttresses absent; spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark pale grey, slightly rough, tessellated or slightly furrowed cork; less than 25 mm thick.
Indumentum: Complex hairs absent; stinging hairs absent; mature twig indumentum (hairs) present or absent, hairs sparse to dense.
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, attached to base of leaf blade, not swollen; leaves broadest at or near middle to broadest below middle, 12.0-21.0 cm, 7.0-15.0 cm; symmetric, entire, not dissected or lobed, obtuse or sub acute, venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface pale green or green, upper surface dark green, indumentum (hairs) absent or present (on lower surface), indumentum (hairs) sparse; absent; domatia absent; stipules present, free, laterally placed, not encircling the twig, leafy, not fringed, large, not persistent.
Flowers: Inflorescence terminal (on short branchlets), flowers arising from a single point (flowers arranged in globular clusters 20-60 mm diam.), cones absent; flowers bisexual, not stalked, flowers with many planes of symmetry, 8.0-11.0 mm long, diameter small (up to10 mm diam.) (3-5 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth orange (sweetly aromatic) or yellow; 5, some or partly joined (forming a long corolla tube and 5 lobes); stamens 5, present (short), free of each other, joined to the perianth; ovary inferior, carpels joined (when more than one), locules 2; styles solitary, 1.
Fruits: Infrutescence arising from single point, fruit 20.0-40.0 mm long, 20.0-40.0 mm diam., brown (strongly aromatic), not spiny, fleshy, multiple (fruits joined by their calyces into an indehiscent fleshy syncarp), indehiscent, drupe; seeds 1 (per fruitlet; many per fruiting head), to about 5 mm long, not winged, broad (as wide as long) (slightly compressed), seed 1-10 mm diam.
Distribution: West Sepik, East Sepik, Madang, Morobe, Western, Gulf, Central, Milne Bay, Papuan Islands, New Britain & Bougainville.
in PNGplants database
Notes: Notes Previously known as Sarcocephalus orientalis (L.) Merr., Nauclea coadunata Roxb. ex Sm., Sarcocephalus coadunatus (Roxb. ex Sm.) Druce, and Sarcocephalus cordatus Miq.