Polygonum polyneuron,
an 80 cm tall annual herb, occurs at seashores, with well-branching
stems at the base. Leaves, 0.5-3cm in length, are long-oblong or
oblanceolate, taking on a dark brown tinge. Leaf axils make two or
three flowers in a bundle; the perianths, each 1.5-3mm long, are
cleft in five and green, and the margins are white to light red and
turn red after flowering. Boom time: September-October.
Wild plants in and around Shimane
島根とその周辺の野生植物
