Bamboo is not a wood but a plant, so its veneer originates in the stems of plants. 

Bamboo veneer is made by "cutting" veneer sheets from a bamboo block. As it is very thin and fragile, a (cellulose) veil is applied to the back. This allows it to be easily pressed onto any surface and used in all kinds of applications in the interior design and furniture sectors.

Applications: floors, furniture, terraces, worktops, doors and frames, etc.

What does "side pr" mean?

The strips are placed vertically next to each other and glued together. This creates a fine line pattern in which the roots of the bamboo are subtly visible.