Write a brief account on classification of xerophytes.

Explanation

On the basis of their Drought resisting Capacity, Xerophytes are generally classified into the following three categories:

1. Ephemerals : They are called .drought evaders" or "drought escapers". They are annuals which complete their life-cycle with in a period of 6-8 weeks. They are found in dry zones.
e.g : Tribulus, chenopodium.
2. Succulents : These are called "drought avoiding plants.. They are fleshy due to storage of water in the form of mucilage. The stored water is sparingly utilised during dry periods.
Examples: a) Stem succulents : Opuntia, Euphorbia.
b) Leaf succulents : Bryophyllum, Aloe, Agave etc.
c) Root succulents : Asparagus, Ceiba.
3. Non-succulents : They are called true xerophytes. These are perennial plants which can, withstand prolonged period of drought.
E.g. : Casuarina, Nerium, Ziziphus, Calotropis, Acacia, etc.