Thank you for visiting NCpedia and sharing your question.
Unfortunately, we do not have any information to help identify the plants your son bought at the Biltmore. You have left a comment on the NCpedia, the online encyclopedia of North Carolina, on an encyclopedia entry about the Biltmore.
You may find contacting the Biltmore helpful. They may be able to help you figure out the name of the plant that they grow (or grew) there. You can find their contact information at http://www.biltmore.com/contact-us. You may also find consulting a nursery with a sample of your plant helpful. They may be able to help you. Finally, you may also find plant books at your local library useful for identifying your plant.
I hope this helps.
Kelly Agan, Government & Heritage Library.