Invasive Alien Species
Species Name: Leersia hexandra
- Family Name:
- Leersia abyssinica A. Rich
L. capensis C. Mueller
- Tropical America
- Perennial, tufted, aquatic or swampy grass with creeping rhizomes, 25-120 cm tall. Stem ascending or suberect or somewhat prostrate below, rooting at the nodes. Leaf sheaths with markedly thickened, fleshy, cuff-like base, this –part densely clothed with rough, retrorse, white hairs, shrink considerably when dry; ligule, thin, round, 4-9 mm long; blade linear, with rough margins, 3-30 x 2-12 mm. Inflorescence terminal panicle, 5-12 cm long, with zigzag slender, sub-erect or spreading branches 2-5cm long; spikelet oblong, 3-4 mm long, overlapping, flattened, asymmetrical on short stalks with short spiny bristles along the margins. Caryopsis oblong, free between the lemma and palea.
- Invaded Habitat:
- Swamps, pools, soggy grasslands, border of the ditches, lowland irrigated, rain fed and tidal rice fields.
- It was still rare in Java in 1860, but now common and spread throughout Indonesia except Mollucas as far as known.
- Permanently moist site, when floating, it may have branches several meter long. It can grow in drains and impede the water flow.
- Backer , C. A. & R. C. Bakhuizen Van Den Brink. 1965. Flora of Java Vol. III. N.V. P. Noordhoff. Groningen, Netherlands
- Barnes, D.E. and L.G. Chan. 1990. Common Weeds of Malaysia and Their Control. Ancom Berhad. Persiaran Selangor, 4000 Shah Alam.
- Moody, K., C.E. Munror, R.T. Lubigan and E.C. Paller. 1984. Major weeds of the Philippines. Weed Science Society of the Philippines, UPLB College, Laguna, Philippines.
- Soerjani, M., A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.). 1987. Weeds of Rice in Indonesia. Balai Pustaka. Jakarta