Ludwigia octovalvis

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Ludwigia octovalvis


Usually robust, well-branched herb, sometimes woody at the base, up to 4 m, subglabrous or with sparse or dense appressed or spreading pubescence. Leaves lanceolate or narrowly lanceolate, to narrowly ovate, or subovate, 2-14 by 0.5-4 cm, narrowly to broadly cuneate at the base and attenuate at apex; Sepals 4, ovate or lanceolate, 6-15 by 1-7.5 mm. Petals yellow, broadly obovate or cuneate, emarginate, 17 by 2-17 mm. Stamens 8, epipetalous ones shortest; Capsule thin-walled, 1.7-4.5 cm by 2-8 mm, terete, pale brown with 8 darker ribs, readily and irregularly loculicidal; Seeds pluriseriate in each cell, free, brown, rounded, 0.6-0.75 mm long, 0.5-0.7 mm wide including the inflated raphe which is equal in size to the body of the seed and evenly transversely ridged.


Throughout the tropics of the world, between c. 32° N and 30° S present
Throughout the tropics of the world, between c. 32° N and 30° S.


In Java minor medicinal qualities are ascribed to this species, amongst others against sprew. RUMPHIUS, who described it under the name herba vitiiginum (Herb. Amb. 6, p. 49) did not mention uses (). BURKILL () reported that the mucilaginous leaves, after which the plant is called 'lakomayef = ‘water Vitis’ f are used for poulticing in a variety of complaints; it has also been recorded as used for headaches, orchitis, glands in the neck, diarrhoea, dysentery, nervous diseases, and as a vermifuge. In WILKINSON'S Dictionary it is said that a kind of tea is made from the leaves. Also in India medicinal properties are ascribed to it.


In my revision (1963) I distinguished three subspecies, more or less geographically defined, which I wish to withdraw here.


C.T. WHITE 1922 – In: Proc. R. Soc. Queensl. p 48
Ridl. 1916 – In: Trans. Linn. Soc. Bot. p 57
Ridl. 1922 – In: Fl.Mal. Pen. p 827
STEEN. 1932: Arch. Hydrobiol. p 314
Clarke 1879 – In: Fl. Br. Ind. p 587
VAL. 1907 – In: Bull. Dĕp. Agric. Ind. Nĕerl. p 41
EVERIST 1974: Pois. Pl. Austr. p 393
HENRY & PRIT-CHARD 1973: p. 132. – In: Bot. Div. Lae, Bot. Bull. fig.
F.v.M. 1876 – In: Descr. Not. Pap. Pl. p 60
RAVEN 1963: p. 356. – In: Reinwardtia. maps 19-20
BACK. 1914 – In: Trop. Natuur. p 62
BACK. 1930: Onkr. Suiker: 470. Atlas t. 446
GAGN. 1921 – In: Fl. Gen. I.-C. p 986
Roxb. 1832 – In: Fl. Ind., ed. Carey. p 401
BACK. & BAKH.F. 1963 – In: Fl. Java. p 261
BTH. 1867 – In: Fl. Austr. p 307
Ridl. 1922 – In: Fl. Mal. Pen. p 828
Koord. 1912 – In: Exk. Fl. Java. p 703