Shrub or slender treelet, 2-10 m. Leaves membranous or thinly chartaceous, oblong to lanceolate, 7-15 by 1.5-4 cm, base acute or attenuate, apex acute-acuminate to long-tapering; Inflorescences among the leaves, small, twice branched (lowest branch 2-5 mm from the base), with hairs 0.1 mm or less; Fruits l(-3) per infructescence, ovoid-ellipsoid, including the 2-3 mm long rostrum 1.6-1.7 by 0.9-1 cm, base contracted into pseudostalk 4-5 mm;
Asia-Tropical, Papua New Guinea present, Western Prov present
Malesia: Papua New Guinea (Western Prov., about 5-6° S, 141° E).
1 Horsfieldia squamulosa is related to H. coryandra, which generally has similar leaves (though usually with coarser venation), but differs in a more elongate male bud, (almost) glabrous androphore, and fruits with a pseudostalk of only 2 mm long. Vegetatively both species much resemble H. schlechteri from the same region, especially in the foliage. 2 Horsfieldia squamulosa forms a coherent group with H. clavata, H. coryandra, H. crux-melitensis, and H. clavata (the clavata-group), species of small trees or shrubs with club-shaped androecium consisting of a relatively large androphore and small sessile anthers at the apex. The remote species H. pulverulenta, H. sterilis, and H. triandra have somewhat similar androecia.