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Some Bamboo genera produce a large central dominant branch. These usually grow on mature nodes of plants that are at least 1 year old. This branch can usually be identified by a large swollen section where it joins the node. It often looks like a smaller version of a clumping rhizome. Underneath the leaves on this branch you will often find several buds and sometimes aerial roots. Those with aerial roots are excellent cadidates for propogation, but even without the roots they can still produce new plants, so it is worth a try. Choose a branch that's at least 9 months old. Since these branches usually grow on plants that are at least a year old, ideal mother bamboo plants should be at least 2years old. Make sure the branch is mature and hardened before you select it for cutting. Carefully cut the branch away from the mother culm taking care to damage the branch and culm as little as possible. After harvesting the branch, cut the branch off just above the second node. Remove any secondary branches by cutting just above the first bud. Plant the branch in a good propagating mix. Keep it moist and warm and with luck it may develope into a new plant.

I have succesfully started new plant from branch cuttings in the past. I have always used branches with visible 'aerial roots' and have seen a good survival rate. I us a similar technique to what is described here. I find that the larger branches, that is branches with a large swollen section survive the best.

I can tell you from experience that B. vulgaris and B. vulgaris "Vitatta" propagate very easy from both branch and culm cuttings. I've hear B. lako will give similar results.

Here's some pics of successful branch and culm cuttings propagations:

www.gator-ventures.com/bamboo/bamboo-pro...-bamboo-cuttings.htm