Tree 5-10 m. Leaves membranous, (elliptic-)oblong, 20-40 by 5.5-15 cm, base nearly rounded to attenuate, apex acute-acuminate; Inflorescences thinly with stellate-dendroid hairs 0.3 mm; Fruits 2-6 per infructescence, broadly ellipsoid to subglobose, 20-25 by 17-20 mm, glabrous (or possibly with few minute hairs at base), finely rugulose, without marked tubercles, drying (reddish) brown;
Asia-Tropical: Philippines (Philippines present), Leyte present, Luzon present, Mindoro present, Samar present, Sibuyan present
Malesia: Philippines (Luzon, Mindoro, Sibuyan, Samar, Leyte).
Horsfieldia ardisiifolia is close to species like H. parviflora and H. smithii, both from the Moluccas, all of which have anthers strongly incurved or inflexed into the androecium cup. Horsfieldia ardisiifolia is distinguished by thick winged or ridged twigs, large leaves, coarse hairs on the leaf buds, male buds 4-4.5 mm wide, and a broad androecium with the anthers deeply incurved and clasping each other.