Castanopsis piriformis
Tree 18–25 m high, 22–46 cm in diam.; bark smooth or shallowly fissured, greenish grey or greenish brown; twigs initially hairy and later glabrescent, densely lenticellate. Leaves spiral, subcoriaceous, narrowly elliptic or elliptic, 8–16 by 3–6 cm, apex acute to acuminate, base cuneate, margin undulate or entire, upper surface glossy green, lower surface pale brown to golden brown, both surfaces glabrous; midrib strongly raised on lower and slightly raised at base on upper surface; lateral veins 8–12 pairs, conspicuous on both sides; cross veins indistinctly scalariform. Petioles 1–1.5 cm long, glabrous. Inflorescences panicles, yellowish, terminal or in upper axils; rachis with densely stellate hair. Male inflorescences 5–15 cm long; bracts and bracteoles ca. 1 mm long; male florets single or cluster of 3–7; perianth 6-lobed, ovate, ca. 1 mm long, connate, outer surface densely hairy than inner surface; stamens 9–12, 2–3 mm long, glabrous; anther 0.2–0.5 mm long; pistillode ca. 0.5 mm in diam. Female inflorescences and mixed inflorescences up to 15 cm long; female florets single, ca. 2.5 mm in diam., perianth 4–6-lobed, ovate, ca. 1 mm long, connate; style 3, ca. 1.8 mm long, glabrous; staminodes 12. Infructescences erect, 10–15 cm long. Acorns pear-shaped, 2.5–3 by 2–3 cm, stalked 0.5–1 cm long. Cupules completely enclosing and free from fruit; wall 1 mm thick; outer surfaces smooth and hairy with conspicuous 3–4 undulate lines. Nuts 1 per cupule, subglobose, 1.8–2.5 cm in diam.
Common in dry evergreen and evergreen forest; alt. 300–410 m.