The growth control center
Several organic pillars support the platform. Each pillar grows, with the aid of bio-computers out of the growth control center. They use hormones to control rooting, stem elongating, directional growth, growth of shoots and the growth of Bromeliad leaves. The platform consists of canopy leaves.
The red dots = plant growth centers Blue lines = Vactube lines
Artificial constructional plants (ACP's)
The plants used to build the platform cities are called artificial constructional plants or ACP's. They resemble natural plants, but they are genetically engineered. The cross section of the organic pillar has basically the same structure as the one of a plant stem.