A June apple is an early ripening variety of apple, maturing in the spring in the southern United States. It tends to be smaller and more tart then later-ripening apples. Most versions of the tune are in the mixolydian mode, although Benton Flippen (Surry Country, N.C.) plays it in A major. The late Mt. Airy, North Carolina, fiddler Tommy Jarrell (1901-1985) played it and sang words to the 'B' part.
jarrell/cockerham

It was recorded by Brad Leftwich, Bruce Molsky, Tommy Jarrell, Fred Cockerham, Roger Sprung, Dan Gellert, The Red Clay Ramblers and others.
It appears in most printed collection of fiddle tunes.