In botany, the term phreatophytes refers to plants that usually obtain the water necessary to grow from areas at a high depth of the soil.
The term phreatophyte derives from the Greek phréar phréatos, well and phytón, plant.
The phreatophytes are, therefore, plants that absorb sufficient quantities of water by means of deep roots, from almost dry soils on the surface.
Phreatophytes are characterized by having a very developed xylem with large vessels that allow rapid circulation of water.
Typical pheatophytic plants are found in the species: Eucalyptus, Prosopis, etc ..
Plants that grow in oases are often phreatophytes as they often need very long roots to survive in certain moments, which reach the humidity coming from deeper aquifers.