In this situation, the point is that all those pointed tips of the leaves of this awkwardly floppy century plant, Agave americana, are extremely sharp, extremely rigid and EXTREMELY dangerous. Those shorter teeth on the margins of the leaves are just as sharp and rigid, and are curved inward to maximize injury to anyone trying to get away from an initial jab. With tips that impale, and marginal teeth that slash, this is one very hateful perennial!

Another point is that this big and awkwardly obtrusive century plant is on a patio at a Mexican restaurant. Yes, it is in a public place where people get dangerously close to it. On Friday and Saturday nights, this restaurant can get quite crowded. Some within such crowds are inebriated, so are more likely to stumble about and bump into things that are best avoided. Those concrete slabs to the left are…