Large, scandent, woody climber; branches pubescent; leaves alternate, elliptic or ovate, serrate-crenate, base oblique, apex acute- acuminate, 6-pairs of costal nerves, pubescent; flowers in terminal, sometimes axillary, dense, paniculate spikes; calyx 5-fid, densely pubescent, lobes spreading, acute, obconical; petals 5, obtriangular; stamens 5, adnate to base of petals; disk 5-lobed, filling the calyx tube with margins free; ovary sunk in the disk, very pubescent, 2-celled, style very short, stigmas 2; fruit pubescent, indehiscent, prolonged into linear wing, 1-celled, 1-seeded samara, nuts enclosed at base by adherent calyx tube, ; seeds subglobose, exalbuminous.