Talk:Cactus

Mentioned are "varieties" of cacti. In fact they are both species and genuses. Opuntia being a genus. When you explain what cacti are, you can give examples of cacti and use vernacular names. When you look at the info from a "technical" point of view, words like variety should be used with care as they have a meaning within the nomenclature. Acanthocalycium klimpelianum var. macranthum is alphabetically the first variety that I am aware of :).

As to methods of preventing evaporation, there are many methods to prevent evaporation employed by cacti. That might be a special subject within the wikipedia? Among them a thick skin few "huidmondjes" stomatals??, retaining water in bulbous stems, reflecting sunlight, being able to absorb dew etc. This should then lead to a new term xerophytes plants that are adapted to drought. These includes succulents and bulbous plants and and..