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Ludwigia decurrens: An annual originating in North
America grows in wetlands along rivers, edges of ponds or swamps,
paddy fields, or the like. 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, singly appear at 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
