Ludwigia octovalvis (Jacq.) P.H.Raven

Last updated: 29 June 2015

Scientific Name

Ludwigia octovalvis (Jacq.) P.H.Raven


Epilobium fruticosum Lour., Jussiaea angustifolia Lam., Jussiaea calycina C. Presl., Jussiaea clavata Jones., Jussiaea didymosperma H. Perrier.,Jussiaea frutescens Jacq. f. ex DC. [1]

Vernacular Name

Malaysia Buyang samalam, lakom ayer, pujang malam (Peninsular) [2]; bajang semalam [3]
Indonesia Cacabean (Sundanese); salah nyowo (Javanese); lakum air (Malay) [2]
India Ban lavanga, banlumga, bavakula, kere haavu, nirkiramkumba, vasalaccira [3]
Thailand Thian nam (Peninsular); yaa raknaa (Northern) [2]
Philippines Tayilakton (Tagalog); talangkau (Iloko); pachar pachar (Sulu) [2]
Vietnam Mu[uw][ow]ng d[aas]t [2]
Japan Kidachikinbai [3]

Geographical Distributions

Ludwigia octovalvis distributed pantropically, between 320o North and 300o South. [2]

L. octovalvis occurs in humid localities, damp grasslands, rice fields, along ditches, in swamps, pools, river beds, on floating islands in lakes and in coconut plantations, from sea-level up to 1500 m altitude. Two subspecies are distinguished, subsp. octovalvis and subsp.sessiliflora (Micheli) P.R. Raven. [2]

Botanical Description

L. octovalvis is a member of the family Onagraceae. It is a perennial, robust, much branched herb and sometimes woody at the base and grows up to a height of 2(-4) m. At the lower part of stem sometimes with aerenchyme, pseudo-aerophores present in inundated conditions normally with appressed or spreading hairs. [2]

The leaves are narrowly lance-shaped to narrowly egg-shaped with a size of 2-14 cm x 0.5-4 cm. The base is narrowly wedge-shaped. The apex is attenuate while the veins have between 11-20 pairs. The old leaves are reddish with the petiole up to 1 cm long. It has four 6-15 mm long sepals that are egg-shaped or lance-shaped. [2]

The petals are broadly obovate or wedge-shaped and slightly notched at the extremity. The size of these yellow petals is 17 mm x 2-17 mm. There are eight stamens. The filaments are 1-4 mm long with the pollen in tetrads. The style is 1.5-3.5 mm long. [2]

The capsule is 1.7-4.5 cm x 0.2-0.8 cm, terete, thin-walled, pale brown, 8 darker ribs, irregularly splitting, and pedicel up to 10 mm long. [2]

The seeds are pluriseriate in each cell, free, rounded and raphe as long as the seed. [2]


No documentation.

Chemical Constituent

No documentation.

Plant Part Used

No documentation.

Traditional Use

No documentation

Preclinical Data

No documentation.

Clinical Data

No documentation.


No documentation.

Poisonous Management

No documentation.

Line drawing


Figure 1: The line drawing of L. octovalvis [2]


  1. The Plant List. Ver 1.1. Ludwigia octovalvis (Jacq.) P.H.Raven. [homepage on the Internet]. c2013. [updated 2012 March 26; cited 2015 June 29] Available from:
  2. Ipor I. Ludwigia octovalvis (Jacq.) P.H. Raven. In: van Valkenburg JLCH, Bunyapraphatsara N, editors. Plant Resources of South-East Asia No. 12(2): Medicinal and poisonous plants 2. Leiden, Netherlands: Backhuys Publisher; 2001. p. 358-359.
  3. Quattrocchi U. CRC world dictionary of medicinal and poisonous plants: Common names, scientific names, eponyms, synonyms and etymology; Volume III E-L. Boca Raton, Florida CRC Press; 2012. p 826-827.