Why, for starters, is the Green Knight green?
It’s a question that’s long vexed scholars of the 14th century chivalric romance “Sir Gawain and the Green Knight.”The movie, like the epic poem, is full of mysteries, most of them unspoken. But the knight’s unlikely color — Why isn’t he a more typical knightly blue? — is a question voiced by the characters of David Lowery’s adaptation, “The Green Knight.” He’s green, answers Dev Patel’s Sir Gawain, because it’s the shade of rot.
The Green Knight, as seen in Lowery’s enchanting Arthurian dream, is an imposing tree of a man, with a wispy beard of twigs and a wooden mane whose movements rustle with the sound of bended, creaking branches. (He’s played by a much-costumed Ralph Ineson.) Early in “The Green…