What a great group, and nice tour you had, Jim. Well done on all the pictures, including the name signs.
That Carpoxylon Macrospermum certainly is lovely, but if you read the sign no wonder it's not for sale anywhere. It says way at the bottom "thought to be extinct, rare in cultivation" and also since it is a native to Vanuatu (near Tahiti, isn't it?) probably not exactly a hardy species. I'll bet there are some in that collection that they need to protect from the cold - although St. Pete is a bit warmer due to being surrounded by water.