A climbing palm with many thorns. It forms large clumps. The stems are 35 m long and 2.5 cm wide. The leaves are 2.6 m long. The leaves climb upwards but arch over. The leaves have 80-100 shiny-green leaflets. The leaflets are 25 cm long and 2 cm wide. The leaf sheath has spines about 5 cm long. The leaflets are limp and regularly spaced. They taper towards the tip. There are 4 m long stalks at the ends of many leaves which helps the plant climb.