南投柯 nan tou ke

Quercus nantoensis Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30: 293. 1911; Pasania nantoensis (Hayata) Schottky; Synaedrys nantoensis (Hayata) Koidzumi.

Trees to 15 m tall. Branchlets chestnut brown, glabrous, conspicuously lenticellate. Petiole usually less than 1 cm; leaf blade lanceolate to narrowly oblong, 7-14 × 2-4.5 cm, subleathery, abaxially glaucous to light green and with adherent, waxy scalelike trichomes, base cuneate and decurrent on petiole, apex acuminate to caudate; midvein abaxially slender, evident and adaxially conspicuously raised; secondary veins 10-15 on each side of midvein. Male inflorescences arising near apex of branchlets of current year; rachis with scalelike glands, sparsely waxy. Female inflorescences 10-16 cm; cupules solitary, scattered, glabrous. Infructescence rachis ca. 3 mm thick. Cupule enclosing ca. 1/2 of nut when young; discoid when mature, 1.2-1.5 cm in diam., enclosing only basal part of nut, basally narrowed; bracts reduced and united into concentric rings, with tawny, waxy scalelike glands. Nut conical, 1-2 cm; scar 5-8 mm in diam., concave. Fl. Jun-Aug, fr. Oct-Dec of following year.

* Broad-leaved evergreen forests; 300-1500 m. C to S Taiwan