Epilimnion 



The upper layer of lakes, subject to disturbance by winds, 

 lying above the Thermocline, (q. v.). cf. Hypolimnion. 



Epinasty 



The downward curvature of a plant organ such as a leaf, 

 caused by the greater growth on the upper surface than on 

 the lower. 



Epiorganism 



A natural group or entity consisting of individual or- 

 ganisms, e. g., a society of termites, a stand or community- 

 type, syn. supraorganism. 



Epiphyll 



An Epiphyte (q. v.) growing on a leaf, e. g., certain 

 lichens. 



Epiphyte 



A plant growing upon or attached to another plant, or 

 often, on some non-living support, deriving no sustenance 

 from the supporting structure, e. g., Spanish moss on a live 

 oak. 



Epiphyton 



An assemblage of organisms scattered on submerged sur- 

 faces which later may become mechanically associated, cf. 

 Periphyton, Lasion. 



Epiphyfofic 



An Epidemic disease in plants, e. g., wheat rust. 



Epithalassa 



The upper layer, above the Thermocline, where Thermal 

 stratification occurs in the ocean. 



Epizoan 



A non-parasitic animal living attached to another, cf. 

 Commensalism. 



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