A little search revealed it's not actually an "aloe", but an Agave americana aka 'century plant'. It got that name because of the unusually long time before it flowers. It's not as long as a hundred years, but closer to twenty. Still that's a long time, and so it's rare to see these plants with that tall aspargus like pole which you see in the photo above. Wiki said blooms would burst forth from each of the nubs along, as the Wikipedia photos show us.

They did:

Hummingbirds find those blooms especially tasty: