Ludwigia perennis

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Ludwigia perennis


Annual herb up to 1 m, subglabrous or minutely puberulent on younger parts. Leaves narrowly elliptic to lanceolate, 1-11 by 0.3-2.7 cm, narrowly cuneate at base, apex subacute; Sepals 4, rarely 5, deltoid, (1.3-)2-3.5 by (0.5-)0.7-1.8 mm, glabrous or minutely puberulent. Petals yellow, elliptic, 1-3 by 0.7-2mm. Stamens usually 4 or 5, rarely more; Capsule thin-walled, glabrous or puberulent, 3-16 (-19) mm long, terete, pale brown, readily and irregularly loculicidal; Seeds pluriseriate in each cell, free, brown with fine brown lines, ellipsoid-rounded, 0.3-0.5 by 0.2-0.25 mm;


Asia-Temperate: Hainan (Hainan present), Asia-Tropical: Borneo absent; Maluku (Maluku present), Ceylon present, Continental SE. Asia present, Hongkong present, Madagascar present, New Caledonia present, S. China present, Senegal, Lake Chad, and the Sudan south to E. Congo and N. Natal present, Tropical Africa present, tropical Australia present
Tropical Africa (from Senegal, Lake Chad, and the Sudan south to E. Congo and N. Natal), Madagascar, through continental SE. Asia (Ceylon to S. China, Hongkong, and Hainan), and throughout Malesia (except Borneo and Moluccas) to tropical Australia and New Caledonia. .


Roxb. 1820 – In: Fl. Ind. p 440
TRIMEN 1894 – In: Fl. Ceyl. p 234
KURZ 1877 – In: J. As. Soc. Beng. p 91
A. & R. FERNANDES 1957 – In: Garcia de Orta. 114, 475
BACK. & BAKH.F. 1963 – In: Fl. Java. p 261
RAVEN 1963: p. 367. – In: Reinwardtia. map 21
Clarke 1879 – In: Fl. Br. Ind. p 588
BACK. 1930: Onkr. Suiker: 471. Atlas t. 447
BTH. 1867 – In: Fl. Austr. p 307
Ridl. 1922 – In: Fl. Mal. Pen. p 828