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Erect, low, herbs with short rhizomes, probably dioecious. Leaves alternate; Inflorescences raceme-like, short, with densely set stiff pedicels. Flowers small with recurved tepals. Stamens free, simple, without appendages, filaments longish, apically bearing an anther consisting of two dorsifixed thecae without appendage. Ovary semi-inferior, one-celled, ovules few, anatropous, apically attached. Fruit with one or two seeds. Seeds with a funicle, with a flimsy aril consisting of uniseriate hairs.


Asia-Tropical: Assam (Assam present); India present; Malaya (Peninsular Malaysia present); Thailand (Thailand present), SE Asia present
There are 2 species, S. membranaceum in SE Asia, India (Assam), and S. caudatum in Thailand and in Malesia: Malay Peninsula.