Cactus belongs to the succulents’ group, plants that
can absorb and store large amounts of water in their plant body and
roots. In this way they can go without water for extremely long
periods. The thorns also have a similar function. They can absorb dew
and thus provide extra moisture. The cactus is from
the plant family of the Cactaceae. There are about 300 genera and
3,000 species. The family has many well-known species because they are
easy to keep alive as a houseplant and are seen as decorative. The
plants can be classified according to their shapes. There are the disc
shape, the spherical shape, and the columnar shape. Certain
cactus types can become very large, others remain
very small.
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