Cyperaceae's a family of monocot flowering plants known as sedges, which superficially resemble grasses or rushes. The family's large, with some 4,000 species described in about 70 genera. These species are widely distributed, with the centers of diversity for the group occurring in tropical Asia and tropical South America. While sedges may be found growing in all kinds of situations, many are associated with wetlands, or with poor soils. Some well-known sedges include the water chestnut (Ele… (More on Cyperaceae)