Oenothera biennis,
a biennial herb originating in North America, grows wild on
roadsides, wastelands, or riversides. Stems branch well at lower
portions and rise to 0.5-1.5m, with hairs facing upward. Leaves are
in a long-oblong-like lanceolate, with sharp tips and shallow
serrations on the margins. Flowers, yellow, measure 2-5cm in
diameter. Capsules are cylindrical, 2-3cm in length. Bloom time:
June-September.
Wild plants in and around Shimane
島根とその周辺の野生植物