Agave franzosinii

Agave franzosinii is a very large and attractive century plant that can grow to 8 feet tall by 10 feet wide. It is usually seen as a single large open rosette with broad powdery bluish-gray large leaves that undulate and bend gracefully. 

The leaves have large teeth along the margins and a dark brown terminal spine. This infrequently flowering plant produces a towering inflorescence with yellow flowers that attract birds and bees.