Maybe Bambusa multiplex? Still hard to see a lot of detail.

Are the culms solid green, or do they have yellow stripes on them? How thick are the largest ones?

Kt

No stripes on the culms. I am recalling though thinking that some were green and some yellow when I was looking at them, even though the yellow is not that apparent in the photo. I don't think they are more than an inch thick.

When I first saw it about a year ago I was struck by the compact vertical growth habit. It's fuller and looser now. I am wondering whether it had been trimmed to keep it tight. I may have to make it a point to try catch the owners at home and inquire.

Thanks for the help...

From what I can see in the photos and by your descriptions, I'll still say it is one of the Bambusa multiplexes.

In south Florida, they should do quite well there, so it is probably at it's optimum height, so it could be Bambusa multiplex 'Golden Goddess' or Bambusa multiplex 'Hedge Bamboo'.

What puzzles me is that the leaves look a bit larger than my Golden Goddess and Hedge Bamboo, and it is growing in a very erect or vertical pattern, which mine don't unless I snare the culms together and cinch them tight as they are growing. After they are mature, you can remove the cinch rope and they will remain very tight and upright. This may be what they are doing.

It would still be interesting to see a close-up of the leaves, culms, and especially the newly emerging culms next season.

Keep us posted on the id search, and if you can get some close-ups, please post them.

Kt