June - September
0.4 - 1.0
Calyx segments (sepals) 4 and triangular. Similar to Lythrum alatum var. lanceolatum when sterile, both having mostly alternate leaves, but they may be distinguished by the size and shape of their leaves. The leaves of Ludwigia are linear to narrowly elliptical, 2.5 cm long and 1.5-5 mm wide. Those of Lythrum alatum are elliptic to elliptic-lanceolate, 5.5 cm long and 10 mm wide. The leaves of Lythrum lineare are also narrow (4 mm wide) but unlike Ludwigia linearis and Lythrum alatum its leaves are mostly opposite. Lythrum lineare - opposite leaves, 4 mm wide Lythrum alatum - alternate leaves, 10-14 mm wide Ludwigia linearis - alternate leaves, 5 mm wide Capsule obtusely quadrangular, 6-8 mm long.
Seeds average approximately 38,000,000/lb.
Found occasionally in wet places, especially in pine flatwoods and prairies of Louisiana and southeast Texas.
Wet soil, muddy shores, and shallow waters, wet places, and pine woods, savannahs, ditches and bogs.