is a 0.5-1.5m tall perennial seen everywhere in fields and
mountains. Stems are thick and hollow and lengthen rhizomes sideways
long to make new growths at the ends. Young stems are edible in raw.
Leaves are alternate, each 6-15cm long, in the oval shape, the lots
becoming pointed abruptly. Branches emerge from the leaf axils and
set many small flowers at the ends. P.cuspidatum is
dioecious. Corollas, varying white to red, are cleft in five lobes.
Bloom time: July- October.