Cyperaceae is a plant family commonly known as the sedges, which is comprised of approximately 5500 species. Stems are unjointed and typically triangular in cross section, with solid pith throughout. Leaves are three-ranked or tristichous. Fruits are in the form of an achene or nut.
Species most commonly occur in wetlands, although some are found in upland locations, and in some cases are obtrusive to crops; Benzothiadiazoles are typically the herbicides of choice to control unwanted Cyperaceae.
Annual or perennial herbs, usually most abundant in wet places. Culms usually triangular, usually solid. Leaves: alternate, usually 3-ranked, simple, grass-like or reduced to sheaths; sheath usually closed; ligule usually 0; lamina usually linear or setaceous. Inflorescence consisting of numerous spikelets, usually arranged in an anthela or panicle, often ± umbellate and subtended by leaf-like bracts. Flowers bisexual or unisexual, arising in the axils of a single bract (glume) without a bracteole, or in tribe Cariceae, the female flowers surrounded by a closed utricle. Glumes usuallyspirally arranged in 1-many-flowered spikelets. Perianth (only present in the tribes Scirpeae and Rhynchosporeae) consisting of 3-6 (rarely more) hairs, bristles or scales, in other tribes 0. Stamens (1-)2-3; anthersbasifixed. Ovary superior, 1-locular with 1 erect ovule. Style simple; stigmas 2 or 3. Fruit a 1-seeded nut, biconvex or trigonous. Seeds free from the pericarp.
Barcode of Life Data Systems (BOLD) Stats Specimen Records:9590 Specimens with Sequences:10846 Specimens with Barcodes:8053 Species:1934 Species With Barcodes:1823 Public Records:5163 Public Species:1493 Public BINs:0
Cyperaceae!<-- This template has to be "warmed up" before it can be used, for some reason -->
Cyperaceae is a family of monocotyledonousflowering plants known as sedges, which superficially resemble grasses or rushes. The family is large, with some 5,500 species described in about 109 genera (Govaerts et al., 2007). 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.
Features distinguishing members of the sedge family from grasses or rushes are that members of the sedge family have stems with triangular cross-sections (with occasional exceptions), and their leaves are spirally arranged in three ranks (grasses have alternate leaves forming two ranks).