Probably Cordyline fruticosa. http://plantsarethestrangestpeople.blogspot.com/2011/01/other-green-cordyline-fruticosa.html
http://www.smgrowers.com/products/plants/plantdisplay.asp?plant_id=3456 What say you about this explanation?
Dunno. Most of the sites I've seen claim C. glauca as a hybrid, but don't specify which species were hybridized to produce it (and IIRC the one site that attempted to trace the parentage only listed one obscure species, which I couldn't find pictures of on-line, and they didn't provide any proof of parentage, so the veracity is questionable). So your link is certainly plausible. I added the second ID mostly because when I worked at a garden center (a while ago now), the plants we got in that looked like the one in the OP were called C. glauca. Obviously that doesn't mean that they weren't C. fruticosa. The difference in care, for my money, is negligible; care advice for one should work for the other just fine. My experience growing them at work and at home was that C. glauca seemed a lot less prone to spider mites than C. fruticosa, it tolerated slightly lower light, and was notably less prone to burnt tips, so what differences there are mostly cut in glauca's favor.
Well, that's another thing: the name's usually given as if it were a species name. Technically probably C. x 'Glauca,' I guess, if the hybrid story is in fact true.
