Cacti (members of the family Cactaceae) and succulents (members of many different families) all have one thing in common: they have modified morphology adapted to conserving water. Because of these adaptations to dry (xeric) environments, they do not need as much care and attention as other house plants. On top of that, they have incredibly curious or grotesque shapes and sometimes contrastingly beautiful flowers. All of these features make them attractive to the collector or enthusiast. And enthusiasts there are! These plants are the source for a huge horticultural industry, not only for indoor houseplant use but also for outside landscaping in xeric environments.