易武柯 yi wu ke

Quercus farinulenta Hance, J. Bot. 13: 365. 1875; Pasania farinulenta (Hance) Hickel & A. Camus.

Trees 6-12 m tall. Branches glabrous, light brown, ± oily when dry. Petiole ca. 1 cm; leaf blade broadly ovate to elliptic, 8-15 × 3-7 cm, thinly leathery, abaxially ± glaucous and with appressed, lamellate, waxy scalelike trichomes, adaxially glabrous, base broadly cuneate and decurrent on petiole, margin entire, apex obtuse to shortly acuminate; secondary veins 8-11 on each side of midvein, abruptly curving apically, obscure near margin; tertiary veins abaxially not visible or very slender, evident. Female inflorescences often with a few male flowers above middle of rachis, 8-22 cm; rachis 1.5-2.5 mm thick, glabrous or pulverulous; cupules in clusters of 2 or 3 but often solitary on basal part of rachis. Infructescences to 20 cm; rachis 3-4 mm thick. Cupule discoid, 3-5 × 8-10 mm, enclosing basal part of nut, basally with a stalk 3-4 × 3-4 mm, wall ca. 0.5 mm thick; bracts almost fused with cupule wall, basal ones united into 6-8 concentric rings, triangular, small. Nut broadly conical, 7-10 × 7-12 mm, glabrous, apex pointed, wall ca. 5 mm thick; scar 4-5 mm in diam., concave. Fl. Aug-Oct, fr. Oct-Nov of following year.

Broad-leaved evergreen forests in mountains; below 1000 m. S Yunnan [Cambodia, Thailand, Vietnam]