Procession: noun: a group of individuals moving along in an orderly often ceremonial way.

From “The Cottagette”: “The grass swept up to the door-step, to the walls–only it wasn’t just grass of course, but such a procession of flowers as I had never
imagined could grow in one place.” (paragraph 11)

Now I understand that the grass and flowers swept in a orderly fashion or perhaps they were put there.