Mesquite can send these down 60 feet to reach moisture
[DOC] [TLE] plants as indicators of ground wateb - USGS Publications Warehouse [PAR] Calif., indicating ground water within reach of the mesquite ... where they can 
send their roots down to tl^e water table or to the capillary fringe immediately... [DOC] [TLE] How Desert Plants Survive - DesertUSA [PAR] As you can imagine, the plants  the producers  in our Southwestern desert ... 
range from the teacup-size Thimble Plains Cactus to the 60-foot-tall 10-ton 
Saguaro.