pomme-blanche

We obtained roots as well -- one of which was the _pomme-blanche_, or Indian turnip; but the most interesting of all was the wild potato, which we dug up -- for, in fact, it is only upon the table-lands of America where that plant is indigenous.

The Desert Home The Adventures of a Lost Family in the Wilderness Mayne Reid 1850

Buffaloes they must be -- elk or deer would look red -- wolves red or white; and they could not be bears, as these last would not likely be out on the prairie in threes, unless, indeed, they might be grizzly bears -- who do sometimes go out into the open ground to dig for the "pomme-blanche" and other roots.

The Boy Hunters Mayne Reid 1850