Green humanlike creatures that grow from a seed planted in the ground. Saibmen cannot speak, but do seem to understand when spoken too.
A total of 6 saibamen are created in the Saiyan Saga. They were all easily defeated except one which self destructed and killed Yamcha.
The Saibamen are quite powerful. It was stated that one Saibamen has a power level of 1200.
Dragon Ball Z: Bardock – The Father of Goku
This special showcases the end of planet Vegeta, and Bardock's resistance against Frieza.