What does 'lingering green' represent?

Question

And he said to himself
in a sunken morning moon
between two pines
between lost gold and lingering green:

I believe I will count up my worlds
There seem to me to be three
There is a world I came from, which is Number One
There is a world I am in now, which is Number Two
There is a world I go to next, which is Number Three

There was the seed pouch, the place I lay dark in, nursed and shaped in a warm, red, wet cuddling place.

There is the place I am in now, where I look back and look ahead, and dream in wonder.

There is the next place-
And he took a look out the window
at a sunken morning moon
between two pines,
between lost gold and lingering green

This is Carl Sandburg's "Between Worlds." I believe 'lost gold' is lost innocence, and a 'sunken morning moon' represents death.

Answer 1

to me it would represent the late autumn/early winter of his life,,,,, where some green still lingers in the trees,,,, the winter of life is often used to refer to nearing the end of this life on earth