Rapid and marked accentuation of unidexterity is a pubescent change.
"Civics and Health"
William H. Allen
The surface is first tomentose or pubescent, becoming smooth, with prominent concentric zones probably marked off by periodical growth; the color is first white, so that the edge is white, becoming cream color to buff, and in age dull brown and sometimes blackish brown in the center of the old plants.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
Corolla tubular, pubescent, 5 lobules.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera