According to the passage mentioned, the phrase that does not show Irving's bias against the Great Plains is:
"has not been inaptly termed 'the great American Desert'".
<u>Explanation:</u>
Irving Washington talks about the massiveness and the daunting Great Plains.
He expresses its harshness to survive in it, and the monotony o the views it holds for acres and acres.
With all this, he does not shy away from calling it or linking it to America, calling it the great American desert.
This shows he agrees to the fact that it is indeed an American desert that holds massive plain grasslands and harsh conditions of survival.
