Here we have another poem unpublished during the lifetime of Clark Ashton Smith, so I'll begin with the text itself:
The splendid aureate rose of Day
With evening pines and fades away,
And through the shadow-shrouded hours
The vast vague bloom of Darkness flow'rs.
A small poem, but the contrasting "splendid aureate rose of Day" and "vast vague bloom of Darkness" creates an almost palpable tension between the day and the night, which makes the poem something more than a simple work of naturalism.