Subshrub. Leaves opposite, united into a sheath at the base. Flowers bisexual, subtended by Zbracteoles, these longer than the perianth; perianth lobes 5, with a brown stripe down the middle; stamens 5; anthers without appendages; staminodes broad, rounded; stigmas 2, filiform. Seeds vertical. One sp.,
Cyathobasis fruticulosa (Bunge) Aellen , Turkey.