When I take my evening walks I often find a small cactus coming up through some little shrub or bush. These plants act as a nurse plant, sheltering the young plant until it is strong enough to withstand weather on it's own. These little cactus's are always like a wonderful little surprise when I find them. This cactus is quit large and is now competing with the shrub that nursed it but I often find tiny little plants that fill me with delight.