In this extra special issue of our journal, I would like to introduce you to a very attractive informal and unranked infrageneric group of agaves which was called the Urceolatae by Gentry, whose type species, Agave utahensis, occurs in south-western USA. They are interesting from both a biological and horticultural point of view. I often used to encounter these wonderful agaves during my endless roaming through the marvelous deserts of south-western USA, where I have studied them at about 30 localities. In this modest publication, I would like to highlight their great beauty and variability, and to illustrate their habitats."