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Adiantum capillus-veneris, the black maidenhair fern, is a species of fern in the genus Adiantum with a subcosmopolitan distribution, native to western and southern Europe, Africa, Nort America, Central America. In the United States, it grows as far north as southern Missouri and southernmost Kentucky, where it will generally be found growing on sheltered, south-facing limestone.
It grows to 20-70 cm tall, with very delicate, light green fronds much subdivided into pinnae 5-10 mm long and broad; the frond rachis is black and wiry.
It is commonly grown as a houseplant.
