from The Century Dictionary and Cyclopedia
- n. A weed-grass somewhat resembling wheat, though smaller, formerly regarded as belonging to the wheat genus, Triticum, but now known as Agropyrum repens. Also quick-, quack-, cutch-, and couch-grass. See especially couch-grass.
Sorry, no etymologies found.
The second consists largely of quitch-grass, the very worst of all, and purslain or pusley, which Charles Dudley Warner has immortalized in his charming book, "My Summer in a Garden."
The roots of quitch-grass are as strong as steel and run rapidly in all directions underneath the surface, sending up tender shoots that break too easily when you touch them.
I believe that words, or even the mere intonation of them, have an astonishing vitality and power of propagation by the root, like the gardener's pest, quitch-grass,  while the application or combination of them may be new.