Polygonatum macranthum is
a perennial herb of approximately 1m in height, inhabiting forests
in mountainous regions. Stems, 60-140cm in length, cylindrical, with
no ridges, curve like a bow at the upper half. Leaves are of two-row
alternate phyllotaxis,15-17cm in length, in the shape of a
lanceolate to long-oblong, with entire margins and short petioles.
Flowers droop downward; single at upper parts and 2-4 in corymbs at
lower positions. The flowers are white, 2.5-3.8cm long,
funnel-bell-shaped, with green tips, and the corolla's segments
warp. Sap fruit is 0.8-1.2cm in diameter and spherical. Bloom time:
may-July... Bloom time: May-July.