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DescriptionPerennial herbs. Leaves alternate. Inflorescences consisting of axillary and terminal bracteate spikes, these densely white-woolly. Modified sterile flowers 0. Flowers bisexual or unisexual. Tepals 5 with membranous margins and a green centre, densely lanate on the back, deciduous with the seed. Stamens 5. Ovule 1. Stigmas 2. Capsule splitting irregularly.