The pileus is papillose, the papill elongated, and forming distinct tubes as the pileus expands.
Style elongated awl-shaped, stigmatic and papillose down one side.
Spores flattish, more or less convex-prismatic, papillose or smooth.
papillose -us: pimply; a surface covered with raised dots or pimples.
The variety papulatum is subrotund, sessile, papillose and pulverulent, the warts being nearly uniform in size.