Raelene from Australia reports a unique canna incident, an old cultivar, Canna 'P.J. Berkman', that has grown a stem that then branched into two separate stems.
It is usual for the stem to start branching once it has reached the level where it stops growing leaves and starts growing inflorescence instead.
Raelene is growing it on, and we all hope that it repeats it's great trick, as we can do with more diversity.
[Ed. No canna authorities that we approached have experienced or heard of this phenomenon previously. However, we now understand that a breeder in England has raised a new cultivar that exhibits this behaviour]