An abnormality is described and illustrated. On the edge of frost-damaged caps of Flammulina velutipes (Curt. ex Fr.) Sing., a ring of about 44 small pilei, each 1.5–3 mm in diameter, forms. These miniature pilei usually have a very short, thin stipe and a few gills. The described fruitbodies were found by Dr. Evžen Wichanský in March 1966 in Kinský Gardens, Prague.
Pilát A. (1969): Regeneratio in margine pileorum Flammulinae velutipedis (Curt. ex fr.) Sing. frigore afflictis. – Česká Mykologie 23(3): 190.