Invasive Alien Species
Species Name: Ludwigia hyssopifolia
- Family Name:
- Jussiaea linifolia Vahl.
Ludwigia micrantha (Kunze) Hara
- Annual erect herb, 15-150 cm tall. Stems ribbed apically, often becoming woody at the base, elongate aerophores arising from burred submerged roots. Leaves short to rather long-petioled, entire, scattered, elongate-lanceolate, 1-10 x 0.25-3.5 cm. Inflorescence solitary, axillary, sessile or nearly so; flowers bisexual, actinomorphic, 4(5)-merous, open at 7 a.m. for only one day; petiole 2.5-18 mm; sepals 4, lanceolate, 3 nerves, 2-4 x 0.7-1.2 mm; petal yellow, elliptic, 2-3 x 1-2 mm; capsule relatively thin walled, 1.5-3 x 1-1.2 mm, sub-sessile; seeds oblong, up to 0.5 mm long.
- Invaded Habitat:
- Shallow freshwater ditches and pools, edges of water courses, excavated drains, mud, moist garden soils, on inundated soils, river edges, waste places, rice fields.
- Throughout Indonesia
- Occurs up to 1 000 m altitude in everwet regions and in those pronounced dry season.
- Backer , C. A. & R. C. Bakhuizen Van Den Brink. 1965. Flora of Java Vol. III. N.V. P. Noordhoff. Groningen, Netherlands.
- Henty, E.E., and G.H. Pritchard. 1973. Weeds of New Guinea and Their Control. Botany Bulletin No. 7. Division of Botany, Department of Forests, Lae, Papua New Guinea.
- Soerjani, M., A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.). 1987. Weeds of Rice in Indonesia. Balai Pustaka. Jakarta.