Appearance
The lanceolate or ovate leaves are opposite, coarsely toothed and have a glabrous upper surface. They are 5 to 10 cm long and 2 to 4 cm wide. The male flower spikes are up to 17 cm long. The female flowers, which occur on separate plants, appear in clusters. These are followed by ovoid capsules which are about 1 centimetre in diameter.References:
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