I have this houseplant, it's a Dracena fragrans.
It's called a "corn plant" in the house plant trade. This one is about 20 years old. It gets too tall and breaks sometimes. Then we stick the broken branch into another pot or back in this same pot and it will grow.
A couple of days ago my wife asked me if I had noticed the flowers on this plant. I had not. I looked up and saw these.
None had opened yet, though. Now that they are opening it is obvious why they are called "fragrans". Intense lily smell, beautiful but overpowering in the evening. We might have to cut it off if it gets much stronger. It looks like it will be opening for a while.