Invasive Alien Species

Species Name: Sphenoclea zeylanica

Family Name:
Pongatium spongiosum Blanco
Reichelia palustris Blancho
Tropical Africa
Annual herb, rather fleshy, erect, more or less branched, glabrous, with white latex, 7-150 cm tall. Roots long, cord-like. Stem hollow, with a peripheral ring of small air ducts, basal part often surrounded by white parenchyma. Leaves entire, oblong to lanceolate-oblong, 2.5-12.5 x 0.5-5 cm.; petiole 3-30 mm. Inflorescence terminal, erect, in dense, conical, 0.8-7.5 cm long, bearing ripe fruit at the base and flower buds at the top; peduncles 1-8 cm long; bracts and bracteoles spathulate, the green apices arched over the calyx before and after anthesis; flowers rhomboid by compression, sessile, wedge-shaped below, attached to the rachis by linear base; calyx tube adnate to the ovary, semi-globose, 2.5-3 mm long; corolla campanulate, 2.5-4 mm long, 5-fid more than halfway down, white, deciduous; stamen 5, inserted half-way  up tube of corolla, filament slightly dilated at base. Capsule cuneate-obconical, 2 locular, 4-5 mm long; seeds oblong, rugose-ribbed, yellowish brown, 0.5 mm long.
Invaded Habitat:
River banks and dry riverbeds, damp marshy or periodically inundated depressions, seasonal swamps, sides of ponds, ditches, and stagnant water, rice fields.
Sumatra, Java, Bali, Sulawesi, Timor
The plants annually occurring in almost any kind of damp ground at low altitude up to 350 m
  1. Backer , C. A. & R. C. Bakhuizen Van Den Brink.  1965.  Flora of Java. N.V. P. Noordhoff. Groningen, Netherlands
  2. Soerjani, M.,  A. J. G. H. Kostermans & Gembong Tjitrosoepomo (Eds.).  1987.  Weeds of Rice in Indonesia. Balai Pustaka. Jakarta