Botany Biology Phenology Ecology Distribution Agricultural importance Chemical control
| Description : | Terrestrial or aquatic, perennial, erect herb, up to 200 cm long, if growing in the water, rooting in the substrate, on the nodes. Roots fibrous, white or brown. Stems erect or procumbent, round, hollow, thickened at nodes, glabrous or hair. Stipules present, sheath-like, hairy. Leaves simple, not lobed or divided, alternate spiral, stalked, more than 2 cm long/wide, hairy on both sides, margin entire, apex acute, base acute or rounded, pinnately veined. Flowers bisexual, grouped together into a terminal spike, stalked, white or pink, petals not visible. Fruit a nut. |