More mathematics Queen Victoria's agave (Agave victoriae-reginae) is a small species of agave noted for its streaks of white on sculptured geometrical leaves, and popular as an ornamental. It is named for Queen Victoria. This agave is highly variable in form, but in general the rosettes are small and compact, composed of short, rigid, thick leaves that are green with a pattern of distinctive white markings. The markings are generally along leaf keels or margins, giving a sort of polyhedral appearance. Marginal teeth are usually lacking, while the terminus of the leaf may include 1 to 3 spines, each 1.5–3 cm in length.
A. victoriae-reginae is found across the Chihuahuan Desert, with about a half-dozen subspecies named. This one was pictured at Real Jardín Botánico de Madrid