Looks like a Dracaena, or perhaps a Cordyline. I have one (many!) like that which is very prolific. I've always thought it was a Dracaena but haven't really tried to get a positive ID.

You may want to put this on name-that-plant. I'm wondering if it's an Aglaonema also.

The leaves are too thin for Aglaonema, and it's more 'reedy' in habit.

You're right, and the veins in the leaves aren't as similar to a plain green A. modestum that I have as I thought, upon further inspection. Also, the nodes on my plant are MUCH closer together, even the parts that grew like a weed outside this summer. Looked a couple times and can't find a Drac. that looks like that. Those yellowed tips scream Drac., though.

So what are you thinking at this point, Nana?