Ludwigia hyssopifolia (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Ludwigia hyssopifolia (G. Don) Exell

Protologue: Garcia de Orta 5: 471 (1957).

Family: Onagraceae

• Jussiaea linifolia Vahl (1798).

• Willow herb (En)
• Indonesia: jukut anggereman, mainang (Sundanese), meligai (Bangka)
• Malaysia: lakum air, inai paya, maman pasir (Peninsular)
• Philippines: pasau na hapai (Tagalog), barigaua (Bikol), manakatud (Iloko)
• Thailand: tien na
• Vietnam: rau mương, rau lức.

Throughout the tropics, including Micronesia and northern Australia.

In Peninsular Malaysia, a cold infusion of the roots is drunk for syphilis. In Sulawesi (Indonesia), the infusion is used for poulticing pimples, boils and other infections. In Indo-China, the plant is taken for diarrhoea and dysentery, enteritis and sprue.

• An annual herb, 5 cm tall (dwarf) or up to 3 m tall, with elongate pseudo-aerophores from submerged roots, young parts minutely puberulent.
• Leaves lanceolate, 1-9 cm × 0.2-3 cm, base narrowly cuneate, apex acuminate, veins 11-17 pairs, petiole 2.5-18 mm long; sepals 4, lanceolate, 2-4 mm long, 3-veined, petals elliptical, 2-3 mm × 1-2 mm, yellow, fading orange-yellow, stamens 8, filaments 0.5-2 mm long, pollen single, style 1-1.5 mm long.
• Capsule 1.5-3 cm × 0.1-1.2 cm, subterete, enlarged in the upper part, thin-walled, subsessile.
• Seeds dimorphous, lower seeds uniseriate in each cell, oblong, brown, each firmly embedded in a cube of relatively hard endocarp, raphe about one third of the length of the seed, seeds in upper, inflated part multiseriate, free, ovoid, pale brown, raphe narrow.

L. hyssopifolia is a common weed of pools, ditches, rice fields, fallow gardens and rice fields, both on clay and sandy soils, from sea-level up to 1000 m altitude.

• [62] Areekul, S., Sinchaisri, P. & Tigvatananon, S., 1987. Effect of Thai plant extracts on the oriental fruit fly I. Toxicity test. Kasetsart Journal of Natural Sciences (Thailand) 21(4): 395—407.
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• [134] Burkill, H.M., 1985—2000. The useful plants of West tropical Africa. 2nd Edition. 5 volumes. Royal Botanic Gardens, Kew, United Kingdom. Vol. 1 (1985), Families A—D, 960 pp.; Vol. 2 (1994), Families E—I, 636 pp.; Vol. 3 (1995), Families J—L, 857 pp.; Vol. 4 (1997), Families M—R, 969 pp; Vol. 5 (2000), Families S—Z, 686 pp.
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• [788] Pételot, A., 1952—1954. Les plantes médicinales du Cambodge, du Laos et du Vietnam [The medicinal plants of Cambodia, Laos and Vietnam]. 4 volumes. Centre National de Recherches Scientifiques et Techniques, Saigon, Vietnam.

• Ludwigia

• Isa Ipor