What is "apteria"

Apteria \Ap*te"ri*a\, n. pl. [NL. See Aptera.] (Zo["o]l.) Naked spaces between the feathered areas of birds. See Pteryli[ae].

n. (plural of apterium English)

Apteria is a genus of flowering plants in the Burmanniaceae, first described as a genus in 1834. It contains only one known species, Apteria aphylla, the nodding-nixie, native to the southern United States (E Texas to S Georgia), Mexico, Central America, the West Indies, and South America.