Obregonia denegrii

This is another one of those plants which doesn't need a flower to catch your attention. For this reason it is quite well known. However it has a reputation for being very hard to grow.

But it isn't really all that difficult if it is given a dry winter rest and limited watering the rest of the year, bright, filtered sun, and a potting mix with extremely good drainage. The reward: a highly decorative and sculptural plant.