Cap: 10-25 mm diam.; glutinous, hygrophanous; rounded then convex. Colour white to grey‑white, often with a yellow‑washed centre; becoming brown‑grey in dried material. Surface glabrous; margin striate, later wrinkled.
Lamellae: Colour white to grey‑white when young; distant (L = 22, l = 1-2); adnate. Edges strikingly white, sometimes appearing sterile due to dense marginal cells.
Stipe: 30-40 × 3 mm, cylindrical, glutinous, white. Veil hyaline and copious; cortina white, rather fugacious.
Context: White; drying brown.
Odour/taste: Odour fairly strong, reminiscent of cooked beetroot (“phlegmacioid”). Taste nil.