Invasive Alien Species

Species Name: Hybanthus attenuatus

Family Name:
South America
Erect, annual herb, simple or much branched, up to 50 cm tall. Stem and branches round, with 2 or 3 longitudinal rows hairs. Leaves shortly stalked, lower one opposite, upper one alternate; blade ovate-elliptic to oblong, 3-8 x 1-3 cm. Inflorescence solitary in leaf axils; peduncle 2 cm long; sepals 5, sub-equal, persistent, 2-4 mm long; petals 5, unequal; upper petals white, 2.5-3.5 mm long; lateral petals 4-4.5 mm long, purple-striped; lower petal white, oval to kidney-shaped 8-10 mm long including claw 4-5 mm long. Fruit capsule, nodding, ellipsoid-globose, 4-5 mm long. Seeds sub-globose, almost smooth and blackish, speckled with whitish specks of scale
Invaded Habitat:
In all kind of annual crops, road sides, waste places
Java, probably has a broader distribution, but data not available
Occurs in 0-400 m altitude
  1. Soerjani, M.,  A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.).  1987.  Weeds of Rice in Indonesia. Balai Pustaka. Jakarta.
  2. Waterhouse, B.M. & A.A. Mitchell.  1998.  Northern Australia Quarantine Strategy.  Weeds Target List.  Miscellaneous Publication