 Variety B. b. macrostipitatus differs from the main form by its grey-orange cap, shorter stipe measuring 5 – 7 cm (2.0 – 2.8 in), longer spores (15 – 18 by 4 – 5 µm), and longer pleurocystidia (30 – 55 by 10 – 14 µm). The variety B. b. glaber has a smooth (glabrous) stipe, and smaller pleurocystidia (35 – 40 by 10 – 15 µm) and cheilocystidia (25 – 30 by 9 – 12 µm).
