Oenothera grandis, a biennial herb originating in North
America, grows wild on seashores, riversides, or open spaces in
western Japan. Stems with many vellus hairs branch at the bases,
crawling on the ground; upper parts ascend obliquely upward to grow
to 20-50cm in height. Leaves are oblanceolate and 2-7cm long; some
are cleft in half or undulated on margins. Flowers are light yellow,
measure 4cm in diameter, and have four petals. Bloom time:
May-October.
Wild plants in and around Shimane
島根とその周辺の野生植物