petiolaris is a perennial herb, 40-80cm in height, growing in
damp forest floors in mountainous regions, the stems are weak, and
nodes are expanding. Leaves, with long petioles, are in the shape of
a long oblong with shortly pointed tips, three prominent veins, and
the leaf margins serrated. P. petiolaris, monoecious, emerge
male inflorescences and female ones from separate leaf axils,
respectively; flowers are all light green, male flowers are with
four tepals and four stamens, and female ones with three tepals.
Bloom time: July-October.