"the grey light like moss in the trees"
Spanish moss
Creative Commons AttributionSpanish moss - Credit: Peter Barwick

Spanish moss, an air-plant which takes its name from the long grey beards of Spanish immigrants it was said to resemble, is ubiquitous across the southern states. 

 

Giant oaks heavily laden with Spanish moss
Public DomainGiant oaks heavily laden with Spanish moss - Credit: John Messina