The stang is the standing forked pole that represents the Horned in Old (“Traditional”) Craft practice. I've written elsewhere about the custom of “dressing” the stang with seasonal garlands, and theorized about the meaning of this practice. It now occurs to me that the garlanding of the stang has an even deeper resonance.
It is universally acknowledged in Old Craft circles that the stang in-stands for the Master Himself. By Robert Cochrane's time (1931-1966), the personification of the “Devil” by the “devil” (i.e. of the god by the priest) had as a practice become moribund, so that the lore associated with it has been passed down only in fragmentary form.
That does not mean, however, that it has not been passed down. The ooser* (rhymes with “bosser,” not “boozer”) is the horned wooden mask worn by the priest when he personifies at the sabbat. Here in the American Midwest, as elsewhere, it has become customary for the ooser, when worn, to be accompanied with a “ruff” or collar of live greenery around the neck which, of course, varies in make-up with the season, just as the stang's wreath does.