Tree 10-20(-30) m. Leaves membranous to chartaceous, elliptic-oblong to oblong-oblanceolate, 18-45 by 6.5-17 cm, base almost rounded to attenuate, apex acute-acuminate; Inflorescences with dense woolly dendroid hairs 1-1.5 mm; Fruits 2-7 per infructescence, broadly ovoid-ellipsoid, 2-3 by 1.5-2 cm, pubescent (hairs 0.5 mm), without lenticels or tubercles;
Asia-Tropical: Borneo present (Brunei present, Sabah present, Sarawak present), W and E Kalimantan present
Malesia: Borneo (Sarawak, Brunei, Sabah, W and E Kalimantan).
2 Horsfieldia splendida is closely related to H. grandis, H. reticulata, H. rufo-lanata, and H. tomentosa, and less so to H. flocculosa, all having similar male flowers. The perianth remains persistent under the fruits in these species, except for H. rufolanata and H. tomentosa. 1 Material of this species was formerly mixed up with H. reticulata, a species with smaller leaves but with almost similar flowers.