Ludwigia prostrata

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Ludwigia prostrata


Annual herb 0.1-0.6 m, subglabrous, often reddish-tinged. Leaves elliptic or narrowly elliptic, 1-13 by 0.3-2.7 cm, glabrous or with a few minute hairs along the veins, narrowly cuneate at the base, apex acute; Sepals 4, deltoid, 1.3-2.5 by 0.7-1.1 mm, glabrous. Petals yellow, narrowly spatulate, 1.3-2.2 by 0.4-0.9 mm. Stamens 4; Capsule thin-walled, glabrous, 12-22 by 0.8-1 mm, ±4-angled, pale brown, readily and irregularly loculicidal, the seeds showing plainly as indentations in the walls at maturity. Seeds uniseriate in each cell, free, pale brown, speckled or striped transversely with narrow darker brown stripes, plump, ovoid, apiculate at one end, 0.5-0.6 by 0.3 mm;


Asia-Tropical: Assam (Assam present); Borneo present; Jawa (Jawa present); Malaya (Peninsular Malaysia present); Philippines (Philippines present), Australasia, Ceylon present, Lesser Sunda Is present, Luzon present, Mindanao present, Mossman R present, N. India present, N. Queensland present, Negros present, Palawan present, S. China present, S. Deccan present, Timor present, Tropical SE. Asia present
Tropical SE. Asia (Ceylon and S. Deccan to N. India, Assam, S. China and Andamans); in Malesia: Malay Peninsula, Java, Lesser Sunda Is. (Timor), Borneo, and Philippines (Palawan, Luzon, Negros, Mindanao). The single record from Australia (N. Queensland: Mossman R.) recorded by C.T. WHITE () is a misidentification of L. hyssopifolia. On the whole L. prostrata is in Malesia a rare species. .


BACK. 1930: Onkr. Suiker: 472. Atlas t. 448
Clarke 1879 – In: Fl. Br. Ind. p 588
BTH. 1866 – In: Fl. Austr. p 308
BACK. & BAKH.F. 1963 – In: Fl. Java. p 261
RAVEN 1963: p. 374. – In: Reinwardtia. map 23
Ridl. 1922 – In: Fl. Mal. Pen. p 829
Merr. 1912: Fl. Manila. p 355
TRIMEN 1894 – In: Fl. Ceyl. p 234
Merr. 1923 – In: En. Philip. p 220
Roxb. 1820 – In: Fl. Ind. p 441