Agave angustifolia

A large, perennial succulent, usually stemless but sometimes with a short stem to 50cm, forming a rosette up to 2m across of stiff, linear to lance-shaped, green or grey-green leaves, with fine teeth along the edges and spines at the tips. Mature plants produce a tall, branching spike of small yellow-green flowers; the main rosette will die off after flowering, but plants often produce offsets