- Genus Arachnis p.p.
- Genus Arachnanthe Blume, Fl. Javae (1828) vi
Monopodial epiphytic or terrestrial plants. Stem usually much elongated, sometimes climbing, with many leaves arranged in two rows. Leaves sheathing at the base, glabrous, deciduous, duplicate, leathery. Inflorescence lateral, a raceme or a panicle. Flowers medium-sized to rather large, usually showy. Sepals free. Petals free, fairly similar to the lateral sepals. Lip not spurred, but somewhat sac-shaped at the base, hinged to the column. Column-foot absent. Pollinia 4, about equal-sized, arranged in 2 bodies,