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Ludwigia decurrens: An introduced annual, native to
North America, grows here in wetlands along rivers, the edges of
ponds or swamps, paddy fields, and similar habitats. Stems,
four-ridged, stand erect and branch well to grow to 80-100cm height.
Leaves are in an alternate arrangement, 5-12cm long, 1.5-3cm wide,
lanceolate to narrow oblong, with next-to-nothing petioles, and
bases becoming wings connecting to the stem's ridges. Flowers,
yellow, 4-petaled, about 3cm in diameter, appear singly at the axils
and open flat. Bloom time: August-October. |
Wild plants in and
around
Shimane
島根とその周辺の野生植物
