Trees; young shoots, petioles, leaf blades abaxially, and rachis of inflorescences yellowish brown puberulent. Petiole 5-10(-15) mm; leaf blade ovate-elliptic, elliptic, or sometimes obovate-elliptic, 9-20 × (4-)6-10 cm, thickly papery, abaxially puberulent or glabrescent, base cuneate to rounded and usually inaequilateral, margin serrate except basally entire, apex mucronate to acuminate; midvein adaxially impressed; secondary veins 15-25 on each side of midvein. Female inflorescence ca. 40 cm. Infructescences dense, 10-27 cm. Cupule globose, 3.5-4 cm in diam., usually splitting into 4 segments when mature, wall ca. 1 mm thick; bracts spinelike, entirely covering cupule, to 1.5 cm, straight or bent, base connate into bundles. Nut 1(or 2) per cupule, broadly conical, 1-1.4 cm in diam., densely hairy; scar covering ca. 1/4 of nut. Fl. Mar-May, fr. Sep-Nov of following year.
More
A large evergreen tree. It grows 25-30 m high. The trunk is 40-100 cm across. Trees form branches low down. The bark is grey-brown and cracked. The leaf stalk is 5-10 mm long. The leaves are alternate and 7-18 cm long by 3.5-8 cm wide. They are oblong or sword shaped and with teeth along the edge. The base is heart shaped or rounded. The leaf tapers to the tip and can have a sharp tip. Leaves are thickly papery. Underneath there are soft hairs. The flowers do not have stalks and are yellow. They are covered with soft brown hairs. The flowering stalk can be 40 cm long. The cup is round and 3.5-4 cm across. The fruit is a nut. It is enclosed in a covering with thick spines. The nut is cone shaped and 1-1.4 cm across. It is densely hairy.
A tropical and subtropical plant. It grows in northern provinces in Vietnam. It occurs in primary and secondary forest. It occurs below 700-800 m altitude. It grows in sandy soil. In Nepal it grows between 1000-2500 m altitude. It grows in broad leafed evergreen forest below 1500 m in southern China. In XTBG Yunnan.
More
Scattered in primary and secondary forest formations in Vietnam. Broad-leaved evergreen forests at elevations below 1,500 metres in southern China.
Home
