To the south lay mud flats, powdery dry but packed hard; and the west was a wilderness of sand.
"Shadow Mountain"
Dane Coolidge
Mountains of powdery snow moved and settled.
"World Beyond Pluto"
C. H. Thames
The pileus is thin, and deeply striate on the margin, covered with a grayish floccose, powdery or mealy substance, the remnant of the evanescent volva.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson