See, thats the "bizarre" part of this. We just purchased this house 2 months ago. The previous owners lived here for about 18 years. Our neighbor planted this in OUR yard (of course it wasn't our yard 15 years ago). Who the heck knows why? I can't even imagine taking one of our indoor potted invasive plants & popping over next door to plant it-lol! The thing is, he's proud of how well it has grown? We'll be putting a fence up in another couple of weeks. So, he'll have to hop the fence to plant the poison oak he's got clippings of:-) May I ask you a question about where to put it? Our house is on a crawl space. I was thinking of putting a clump of it in a shady spot right up against the house & the deck. I'll keep it in check by chopping the rhizomes, as you mentioned. However, if they go under the house (into the crawl) or under the deck, will that be a problem? There is absolutely no light under the crawl & almost completely dark under the deck. Will the plant naturally "not" grow in those areas? I don't want to create a bigger problem. I'm also going to offer the rest up on freecycle or the va board here at gardenweb (free for the digging). Do you think people would want this? Any transplant issues I should know about? Thanks so much.

You'll probably have much better luck posting a request for IDs along with pictures (embedding the pictures in the post would help) in the Name That Plant Forum. Here's a link to that forum... Here is a link that might be useful: Name That Plant Forum

Your most reliable source would be the builder of that model home. Since it is new there should be no problem finding the reference number.

Dracaena marginata has red margins, hence, presumably the species name. This plant might even be a local native species of some kind. If you have any operating in the vicinity you might try taking a sample of it to one or two independent garden centers to see if anybody there can name it.