On y. birch. Spores: (10.9) 11.9 - 15.1 (15.4) × (4.2) 4.3 - 5.3 (5.6) µm
Q = (2.5) 2.6 - 3 (3.3) ; N = 19
Me = 13.7 × 4.8 µm ; Qe = 2.9