1227

 Ludwigia hyssopifolia(G.Don) Exell

Synonyms	:	Ludwigia micrantha (Kunze) H. Hara
Family	:	Onagraceae
Local name	:	English- water primrose
Flowering and fruiting period	:	Throughtout the year
Distribution	:	South and Southeast Asia
Habitat	:	A very common weed of pools, along drains,
Uses	:	lant is sometimes harvested from the wild for local use as a dye and medicine.
Key Botanical Characters An erect annual herb, 15−150 cm tall and minutely hairy during early stage of growth.Stem: often 3-4 angled, green or purplish, and with white spongy pneumatophores arising from submerged roots.Leaf: lance-shaped, petioled, and up to 9 cm long.Inflorescence: solitary flowers, borne at axils of leaves; 4 yellow petals, elliptic, up to 3 mm long. Fruit: finely hairy, almost cylindrical, 1.75−2.5 cm long capsule.