We moved to a new house that has several of these plants. I really like them but unfortunately they are beginning to lay down and the leaves are yellowing. I've taken leaf samples to the nursery but no one knows what it is. Can anyone tell me a) what kind of plant it is and b) what might be wrong with it.

Thanks!

it could be a Kalanchoe pinnata also known as the air plant or the goethe plant. I am not sure though.