The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus Carex with over 2,000 species.
Deep Run Ponds Natural Area Preserve is a 706-acre (2.86 km2) Natural Area Preserve in Rockingham County, Virginia. The preserve contains one of the largest remaining systems of Shenandoah Valley sinkhole ponds in Virginia. Such ponds are found in Rockingham and Augusta counties; their water levels fluctuate throughout the year. The preserve's eight sinkhole ponds support a variety of rare plant and animal life; two ponds support the rare Virginia sneezeweed, while others contain black-fruited spikerush, northern St. John's-wort, Buxbaum's sedge, and northern bog clubmoss.
Scirpus ancistrochaetus is a rare species of flowering plant in the sedge family known by the common names barbedbristle bulrush and northeastern bulrush. It is native to the northeastern United States from New Hampshire south to Virginia. It used to be found in Quebec but it is now thought to be extirpated there. It was also believed extirpated from the state of New York, but at least one population has been rediscovered in Steuben County in 2010. It is threatened by the loss and degradation of its wetland habitat. It is a federally listed endangered species.
The flora of Lebanon includes approximately 2,600 plant species. Situated on the eastern coast of the Mediterranean Basin, Lebanon is a reservoir of plant diversity and one of the world's biodiversity hotspots for conservation priorities. Endemic species constitute 12% of the Lebanese flora; 221 plant species are broad endemics and 90 are narrow endemics. Important Plant Areas (IPAs) featuring the country exceptional botanical richness were defined in 2018.