Invasive Alien Species
Species Name: Waltheria Americana
- Family Name:
- Waltheria indica L.
- Probably Tropical America
- An erect sub-shrub, often woody at the base, 30-150 cm tall. Petiole 2 cm long, leaves broadly ovate-oblong, the base rounded, or sub-cordate, 1.5-7 x 1-6 cm , the terminal one much reduced, grayish tomentose beneath, finely dentate. Inforescence glomerated in leaf axils, sessile or shortly stalked, 5 mm long; bracts and sepals pale green, corolla somewhat exserted .Fruit capsules small, membranous, enclosed by persistent calyx, hairy toward the top. Seeds trigonous, smooth, reddish brown, 2 mm long.
- Invaded Habitat:
- Dry, sunny grassy fields, arable lands, dams, dunes, rubber plantations in West Java, oil palm plantations in Bangka island.
- Java, Sumatra.
- Flowers throughout the year, in Java found at 5-125 m alt.
- Backer, C.A. and R.C. Backhuizen van den Brink. 1963. Flora of Java. Vol. I., N.V. Noordhoff-Groningen, The Netherlands
- Pancho, J.V. and S.R. Obien. 1983. Manual of Weeds of Tobacco Farms in the Philippines. Philippine Tobacco Research and Training Center, Mariano Marcos State University, Batac, Ilocos Norte, The Philippines.