PNGTreesKey – Sterculia peekelii Mildbr.


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

Sterculia peekelii Mildbr.

Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem Vol. 10: 281 (1928)

Other Literature: Lembaga Penelitian Hutan 124-126 (1976)

Family: Malvaceae

Timber Group: Non-timber species

Field Characters: Small sub-canopy tree (c. 12- 20 m high); Bole cylindrical (c. 25 cm diam.); straight; buttresses buttresses absent; spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark grey, usually smooth; Subrhytidome (under-bark) white; less than 25 mm thick; bark blaze consisting of one layer; faintly to non-aromatic; outer blaze yellow (pale (cream-coloured) or white, markings absent, fibrous; inner blaze white or yellow (pale (cream-coloured), markings absent, fibrous; bark exudate (sap) absent; terminal buds not enclosed by leaves.

Indumentum: Complex hairs present, star-like (stellate); stinging hairs absent; mature twig indumentum (hairs) present or soon absent, hairs sparse.

Leaves: Leaves clustered at end of branches or 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, not winged, attached to base of leaf blade, slightly swollen or not swollen; leaves broadest at or near middle, 16.0-30.0 cm, 9.0-13.0 cm; symmetric, entire, not dissected or lobed, obtuse or slightly acuminate, venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface pale green or green, upper surface green, indumentum (hairs) present, indumentum (hairs) sparse (hairs stellate); absent; domatia absent; stipules present, free, laterally placed, not encircling the twig, leafy, not fringed, large (c. 5 mm long), not persistent (soon dehiscent, only present at growing point of branchlets).

Flowers: Inflorescence axillary, flowers on a branched axis, cones absent; flowers unisexual, unisexual with male and female flowers on the same plant, stalked, flowers with many planes of symmetry, 10.0-12.0 mm long, diameter small (up to10 mm diam.) (c. 5 mm diam.); perianth present, with all sepals and/or petals (hence tepals) similar, inner perianth red (towards base of inner surface), green, or pale brown; 5, some or partly joined (forming a perianth tube and 5 perianth lobes); stamens 20 (c. (male flowers), absent, joined (to form a staminal tube around the ovary and style), free of the perianth; ovary superior, carpels separate (when more than one), locules 3-4; styles free, 3-4.

Fruits: Infrutescence arranged on branched axis, fruit brown, not spiny, non-fleshy, aggregate, dehiscent, follicle; seeds about 10 mm long, not winged, seed 1-10 mm diam.

Distribution: Eastern Highlands.

Sterculia peekelii
Botanical records
in PNGplants database

Map details


Notes: Notes The genus Sterculia was previously classified in the family Sterculiaceae. Sterculia peekelii is inadequately known and its taxonomic status is unclear.