These are usually succulent, often deciduous (but not always) plants with thickend, woody stems/roots (either above ground or just below ground). The succulent varieties (non-cycad/palm/fern) plants are also referred to, by collectors, as \'fat plants\'. Generally these are slow growing plants often collected and displayed for their unusual caudeces. For display purposes, the caudex is always partially above ground (even though the \'natural state night be to exist below the surface) for ornamental reasons. Most caudiform plants have relatively small roots (as most of the energy and water is stored in the caudex) and perform well as bonsais and in small pots. Some of these \'fat plants\' are extremely expensive and highly sought after. There is even a website devoted to caudiciform plants (see Fatplants on the web). There are many representives from many different genera, often totally unrelated, in this \'category\' of plant, from Euphorbias to Morning Glories to minature succulent trees.