疏齿锥 shu chi zhui

Trees ca. 25 m tall. Branches glabrous; 1st-year branchlets purplish brown. Petiole to 1 cm; leaf blade oblong to obovate-elliptic, 6-12 × 3-4 cm, firmly papery, abaxially covered with tight grayish waxy scalelike trichomes, base broadly cuneate to rounded and often slightly oblique, margin sparsely serrate, apex acuminate to sometimes caudate; midvein and secondary veins adaxially with small ribs; secondary veins 10-13 on each side of midvein. Infructescences 7-10 cm; rachis 4-5 mm thick. Cupule subglobose, 3-3.5 cm in diam., wall 1-2 mm thick; bracts spinelike, 3-6 mm, free but a few in bundles and transversely united to discontinuous cristate rings. Nut 1 per cupule, flat-conical, 1.8-2.4 cm, puberulent; scar basal, 1.8-2.4 cm in diam. Fl. Apr-May, fr. Sep-Nov.

* Broad-leaved evergreen forests; 1000-2200 m. C to SE Yunnan