Thanks, so many replies in such short time.
Tiffany: yes, there are some cut-off leaves still attached to one stem (friend saw the leaves dried dying and cut them off).
Alice & Tiffany: I checked the soil: dry and strange kind of media. Just watered some more (now inside). The plastic pot of bottom reservoir type is huge (12") for two (the third small one has died or withered, I think) long sticks of dragon tree! I want to soon repot them in a smaller pot with just regular MG potting soil. Please correct me if wrong.
Lin: I still think it's some kind of Dracaena as I looked all the dragon tree pics in data base (many of them are yours
and some of them looked having stems as green as these do. May be these are still young? The Yacca looks like growing in single stem with no branch-out as these do. And these (ones I received) don't seem to have as HARD cane as bamboo does? Bamboo also don't branch-out, right?