Dwarf Rhapis palms (Rhapis excelsa) and a few other palms can be used in
bonsai.
Sort of. They can be kept small by root pruning, but not everyone would
consider them true bonsai. Dwarf bamboos are also grown, shall I say, with
bonsai, rather than as bonsai.


Iris,
Central NY, Zone 5a, Sunset Zone 40
"The trouble with people is not that they don't know but that they know so much
that ain't so."
Josh Billings (Henry Wheeler Shaw), 1818-1885