Invasive Alien Species

Species Name: Elatine triandra

Family Name:
Annual, delicate, glabrous herb, often much branched and forming dense patches. Stem 1-15 cm long; stipule minute, ovate-triangular, dentate. Leaves opposite, entire, ovate, oblong, lanceolate to spathulate, 3.5-15 x 1.5-4 mm. Inflorescence minute, sessile or sub-sessile, alternately axillary on the right or left side of the stem, actinomorphic, bisexual; sepal 2-3, persistent; petal 2-3, free, white or pink, 1-1.25 mm long; stamen 3,; ovary superior, globose; stigmas 3, sub-sessile. Fruit capsule, sub-globose, wall very thin; seeds numerous, oblong, rounded at both ends, slightly curved, yellowish brown,  0.5 mm long
Invaded Habitat:
Lowland  irrigated rice fields; in shallow lakes, froms dense patches on the bottom, locally numerous
Sumatra and Java
Occurs at 500- 2000 m altitude
  1. Backer , C. A. & R. C. Bakhuizen Van Den Brink.  1965.  Flora of Java. N.V. P. Noordhoff. Groningen, Netherlands.
  2. Pancho, J. V. and M. Soerjani. 1978. Aquatic Weeds of Southeast Asia. Univ. of the Philippines at Los Banos and SEAMEO BIOTROP, Bogor.
  3. Soerjani, M., A.J.G.H. Kostermans,  G. Tjirosoepomo & 1987.  Weeds of Rice in Indonesia. Balai Pustaka. Jakarta.