This is a Sansevieria Cylindrica bought in July. Unexpectedly, it is going well. Although it does not like Japanese humid summer, the baby shoot on both sides are growing well.
Pleased by the condition of the Cylindrica, I found a dying humbertiana at a gardening shop, and bought. You can see bases of some of the leaves are dead.
The leaves with dead bases were cut and planted in vermiculite. Just try.