Invasive Alien Species
Species Name: Stachytarpheta jamaicensis
- Family Name:
- Tropical America
- Perennial herb or sub-shrub, with numerous curving ascending branches, up to 100 cm tall. Stem slightly flattened or square stem. Leaves opposite, on winged stalks, oval or elliptic, 4-10 cm long, with toothed edges; leaf-blade flat. Inflorescence a terminal spike, the rachis thickened, the flowers arising from depressions in it; corolla tubular at the base, above expanded, purplish blue, about 1 cm across; stamens 2 inside the corolla tube; after flowering the rachis become more thickened, so that it is distinctly wider than the depressions holding the fruit. Fruit elliptic-oblong, about 3.5 mm long, enclosed in the dry calyx, finally splitting into 2 nut-lets, the inner side of each quite flat.
- Invaded Habitat:
- Waysides, secondary forest, fences along streamlets, grass-fields, brushwood, young forest, watersides, often numerous.
- Commonly found in Java. Known in South Sulawesi and West Timor. It is widespread all over Papua.
- Sunny or slightly shaded, not too dry places. In Java up to 500 m alt.
- Backer , C. A. & R. C. Bakhuizen Van Den Brink. 1965. Flora of Java. 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