Agave americana Century Plant
This plant is a very common sight over much of the Mediterranean and these are smallish ones. Along the edge of the leaf are stiff recurved black spines which can prove a real barrier to access if the plants are close together.
Seeking new flora in Spain earlier in the year, we passed among many A. americana growing in a huge plantation by the sea at Cabo de Gata. Each of us received stab wounds through casually brushing against the spines on the leaves.
The Century Plant, originally from Mexico, flowers once and then dies often after 25 years of growth but produces offspring vegetatively as well so in favourable conditions can populate and area and dominate the landscape.