What does the line "Pastoral Scene of the gallant south" in Lewis Allan's "Strange Fruit" poem mean?

This poem was
written in the 1930s as a protest again the lynching of black men in the American South.  In the
second verse, we see that The bulging eyes and the twisted mouth of a body hanging in a poplar
tree is a scene of the gallant South.  This is an ironic description, heavy with sarcasm and
yet revealing of the cultural climate of the day.  Here Allan is indicating that this practice
of killing African-Americans and stringing them up in trees was an undeniable contour of the
landscape of the South at that time, and any gallant Southern traditions €“ those famous
Southern manners, the dignified rural plantation life €“ all of it boiled down to and was
overshadowed by these lynchings.  This horrible discrimination was as much a part of Southern
cultural identity as the pastoral scenes and gallantry associated with the region.  And by
comparing the dead men in the tree to fruit, Lewis implies that these hate crimes are the direct
result of seeds sown within the Southern culture, a culture that could somehow turn a blind eye
to this sort of discriminatory violence while at the same time laud itself for the beauty of the
its nature and the cultivation of its people.