Which species are suitable for mass(micro) propagation?

[Behrooz Hariri]

I'd like to know which species of cacti are suitable for clonal multiplication. These cacti should have the following characteristics:
1- Require a long time from starting stage to maturity (slow growth)
2- High commercial value, expensive
3- Difficult to propagate by normal methods (success rate is low)

Behrooz Hariri

[daiv]

This appears to be a duplicate of this post:

http://www.cactiguide.com/forum/viewtopic.php?t=8935