Carex merritt-fernaldii, or Fernald's sedge,^[1] is a species of sedge from northeastern North America.^[2] It was first described by Kenneth Mackenzie in 1923.^[3] It is named after botanist Merritt Fernald.^[2]

This species can be found in a variety of places, such as cliffs, balds, ledges, meadows and fields, and woodlands, as well as anthropogenic surroundings.^[4] It is a perennial that has two types of stems - some with flower/fruit clusters (spikes) at their summits, known as reproductive stems, and others that lack spikes, known as vegetative stems.^[5] Stems are triangular. Its habitat is sandy or rocky acidic sterile soils, but it can also be found in drying peat blogs.^[6]