紫椴(原变种) zi duan (yuan bian zhong)

Tilia amurensis var. tricuspidata Liou & Li.

Branchlets white stellate pubescent, glabrescent. Leaf blade 4.5-6 × 4-4.5 cm, hairy only in vein axils on abaxial surface, base cordate, apex acute or acuminate, sometimes 3-lobed. Bract stalk 1-3.5 cm. 2n = 82.

Heilongjiang, Jilin, Liaoning [Korea, Russia].

Plants with 3-lobed leaf tips have been placed in var. tricuspidata.