This looks like a typical Agave plant. The group of plants was about 2 meters long with the leaves reaching 2-3 ft and the blossom close ot 5 ft tall. It turns out that the blossom here looks different than most on the internet as it is a younger bloom (See comments below).
Although the Century Plant is abundant in Ecuador, this was obviously planted for decorative purposes, so I'm not sure if this particular species is found naturally or only cultivated. These particular plants were in the middle of Quito, Ecuador, altitude 2,850 m.
I really thought I would be able to find these on internet, and in fact I did find 3 different fotos, but none of them had either a common or scientific name. So, I need some help.
Lat: -0.18, Long: -78.46
Spotted on Feb 19, 2019
Submitted on Feb 19, 2019