Nervilia Comm. ex Gaud.
脈葉蘭屬
Terrestrial herbs with underground corms but lacking aerial leafy stems. Leaves solitary, producing from corm after anthesis, convolute, usually orbicular, cordate or reniform, petiolate, often strongly plicate, not articulate, entire, wavy crisped or angular on margins. Inflorescence arising from corm, with 1, 2 or several racemose flowers; peduncle erect, slender, with distant tubular sheaths; bracts small or long and slender. Flowers more or less pendulous, resupinate or not; sepals and petals similar, narrow, spreading, or connivent; lip sessile or subclawed, adnate to base of column, spurless, 2-3-lobed or nearly undivided; column elongate clavate, apex dilated, without distinct wings; anther terminal, incumbent; pollinia 2, cleft, soft granular, without caudicle or viscidium; stigma single, concave, situated under short rostellum. Capsules erect or pendulous.
About 50 species, mainly in tropical and subtropical Asia and Africa. Five species in Taiwan.
