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PNGTreesKey Lithocarpus lauterbachii (von Seemen) Markgr.

 

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

Lithocarpus lauterbachii (von Seemen) Markgr.

Botanische Jahrbucher für Systematik, Pflanzengeschichte und Pflanzengeographie Vol. 59: 69 (1924)

Other Literature: E. Soepadmo, Flora Malesiana, Series 1, 348 (1972)

Family: Fagaceae
Dicotyledon

Timber Group: Major exportable hardwood

Field Characters: Large canopy tree or Small sub-canopy tree (12-36 m high); Bole cylindrical (up to 60 cm diam.); straight (bole up to c. 15 m long); buttresses buttresses absent; spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark grey or brown (pale to dark), slightly rough, fissured; Subrhytidome (under-bark) green; less than 25 mm thick; bark blaze consisting of one layer; faintly to non-aromatic; outer blaze white or yellow (pale (straw-coloured), markings absent; inner blaze white or yellow (pale (straw-coloured), markings absent; bark exudate (sap) present, colourless, not readily flowing (spotty), colour not changing on exposure to air, not sticky; terminal buds not enclosed by leaves.

Indumentum: Complex hairs present, star-like (stellate); stinging hairs absent; mature twig indumentum (hairs) present or absent (branchlets becoming glabrous), hairs dense (initially).

Leaves: Leaves spaced along branches, spiral (leaves occurring singly at a node and arranged spirally up the branchlet), simple (a leaf composed of a single blade); petiole present (5-10 mm long), not winged, attached to base of leaf blade, not swollen; leaves broadest at or near middle or broadest below middle, (8.0-) 10.0-13.0 (-16.0) cm, (4.0-) 5.0-6.0 (-8.0) cm; symmetric, entire, not dissected or lobed, acuminate, venation pinnate, secondary veins open, prominent (7-)8-9(-10) pairs), intramarginal veins absent; leaves lower surface pale blue-green or grey (pale (with adpressed stellate hairs), upper surface green or brown (pale (to dark brown), indumentum (hairs) absent (above) or present (below), indumentum (hairs) dense; absent; domatia absent; stipules present, free, laterally placed, not encircling the twig, leafy (linear), not fringed, large (c. 4 mm long), not persistent.

Flowers: Inflorescence axillary or leaf-opposed, flowers single (female) or flowers on an unbranched axis (male in clusters of 3s), cones absent; flowers unisexual, unisexual with male and female flowers on the same plant, not stalked, flowers slightly asymmetric, 2.0-4.0 mm long, diameter small (up to10 mm diam.) (c. 3 mm diam.); perianth present, with all sepals and/or petals (hence tepals) similar, inner perianth yellow (pale (cream-coloured) or pale brown; 6, some or partly joined; stamens 10-12, present, free of each other, free of the perianth; ovary inferior, carpels joined (when more than one), locules 2-6; styles free, 3.

Fruits: Infrutescence single or arranged on unbranched axis, fruit 25.0-28.0 mm long, dark brown, not spiny, non-fleshy, simple, indehiscent, nut; seeds 1, much more than 10 mm long (15-18 mm long), not winged, broad (as wide as long), seed more than 10 mm diam. (12-15 mm diam.).

Distribution: West Sepik, Madang, Morobe, Western Highlands, Eastern Highlands, Southern Highlands & Central.


Lithocarpus lauterbachii
Botanical records
in PNGplants database

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