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. Leave are
oblanceolate, 2-7cm in length; some are cleft in half or undulated
on margins. Flowers, light yellow, measure 4cm in diameter, with
petals four in number. Bloom time: May-October.
Wild plants in and around Shimane
島根とその周辺の野生植物