So, there are a few routes around Austin where you almost always see cyclists. Usually it is on a road with a bike lane, large shoulder, or where there is less traffic. Anyway, the reason I am saying this is because I always see different types of vegetation depending if I am going North, South, East, or West on a bike. Going out west I always ride through Rollingwood, which has some nice houses with the manicured lawns and beautiful gardens. One day I passed by this huge, I mean huge Agave. The flower spike extends into the sky like 20 feet. I always 
make sure to pass by this beast on my way out west.
A little more on this species of agave. It is called the Weber’s Agave, Agave Weberi, part of the Agavaceae family It is found throughout the Southwest of the US and Mexico. The impressive flower panicle can extend more than 26 feet and bears clusters of little yellow flowers.