That looks like Schomburgkia tibicinsis.
I picked up a plant of it last year, as I was smitten with it from years ago. A HID grower from our society had one flowering in his plant room when I came for a visit. Mine's not even close to flowering size, but definately looking forward to it. Hopefully it does not out grow my space on the way to blooming size!
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DaveW
"Every time you spend money, you're casting a vote for the kind of world you want." ~Anna Lappe