Invasive Alien Species
Species Name: Cyperus spacelatus
- Family Name:
- Tropical Africa or America.
- Annual with fibrous roots, without stolons, 10-30 cm tall. Stem slender to rather stout, tufted, sharply 3-angled, smooth. Leaves few, shorter than the stem,linear, flat or slightly channeled. Inflorescence terminal, simple or compound, lax; involucral bracts foliaceous, erect, patent, unequal, slender lower one up to 20 cm; primary rays 3-5, unequal, up to 10 cm, secondary rays if present 0.5-1 cm; spikes broadly ovoid, usually 2 x 3 cm, sometimes up to 5 x 8 cm, with 3-10 spikelets; spikelet with 10-20 flowered, 1-2 cm x 0.8-1 mm; flowers bisexual, naked; stamens 3. Nut sharply tri-angels ellipsoid or slightly obovoid, concave at the ventral side, brown, 1.3-1.5 x 0.8-1 mm.
- Invaded Habitat:
- Grasslands, upland rice fields.
- First collected in North Sumatra in 1922, spread throughout Indonesia except, Sulawesi and Nusa Tenggara as far as known.
- Grows in low altitudes, spread fast.
- Backer , C. A. & R. C. Bakhuizen Van Den Brink. 1965. Flora of Java. N.V. P. Noordhoff. Groningen, Netherlands
- Soerjani, M., A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.). 1987. Weeds of Rice in Indonesia. Balai Pustaka. Jakarta