monopodial herbs. Stems elongate, with many nodes, often rooting at nodes.
Leaves distichous, usually well spaced; leaf blade flat, rather narrow,
slightly fleshy, with sheathing base, jointed to sheath. Inflorescences
lateral, many flowered raceme, piercing sheath. Flowers small, fleshy. Sepals
larger than petals. Lip attached to base of column, immovable, with a distinct
spur. Column cylindric, short, base slightly dilated, without a foot; rostellum
short. Pollinia 4, waxy, each completely divided into 2 unequal pairs, flat,
subglobose; viscidium ovate; stipe short, widening toward apex.