Basionym Name:Stereocaulon botryosum f. pygmaeum H. Magn., Ark. Bot. 33A(no. 1): 91 (1946)
Homotypic synonyms:Stereocaulon spathuliferum f. pygmaeum (H. Magn.) I.M. Lamb, J. Hattori bot. Lab. 43: 234 (1977)