1.Nutlets ovoid or subglobose, smooth or glandular foveolate, viscid when moist, with a white basal areola.
小坚果卵球形或近球形，顺利或者腺蜂窝状，粘什么时候潮湿，带有白色基本网隙。
2.styles connate into a clavate to subglobose column, narrowed at base, 3-lobed at apex. Fruit not known.
花柱合生为棍棒状到近球形柱状，在基部狭窄的，在先端3裂。
3.Fruit subglobose or obovoid, base contracted into a slender, 2-4 mm stalk; leaf blade lanceolate or falcate, rarely oblong-ovate.
果近球形或倒卵球形，基部收缩成为一纤细，2-4毫米柄；叶片披针形的或镰刀形，很少长圆状卵形。
4.stigma capitate. Capsule subglobose, circumscissile.
柱头头状蒴果近球形，周裂。
5.Leaf blade ovate to elliptic-ovate, margin usually not lobed, irregularly doubly serrate; fruit oblong or ovoid-oblong, rarely subglobose.
卵形叶片卵形到椭圆形，边缘通常不裂，不规则重锯齿；果长圆形或卵球形长圆形，很少近球形。
6.Capsule subglobose to broadly ellipsoid, apex not mucronate; inflorescences corymbose, flowers lax.
蒴果近球形到宽椭圆形，先端不短尖；伞房状的花序，疏松的花。
7.Capsule straight in relation to pedicel, globose to subglobose, shorter than calyx, dehiscence circumscissile.
关于花梗的直的蒴果，球形到近球形，短于花萼，开裂。
8.Flower buds in pairs, lateral, separated by terminal leaf bud, subglobose, pubescent with yellowish brown trichomes, apex acute.
成对花芽，侧生，被顶生叶芽分开，近球形，短柔毛具黄棕色，先端锐尖。
9.Seeds lenticular, reniform, subglobose, or shortly cylindric, smooth or verruculose.
种子凸镜状，近肾形，近球形，或者短圆筒状，光滑或多疣。
10.Seeds glossy black-brown or black, subglobose or oblate, orbicular-reniform, tuberculate or ribbed, with pale caruncle.
种子黑棕色或黑色的有光泽的，扁球形，近球形或圆形肾形的，具瘤或棱，具浅的种阜。