Name requested: Rhinotrichum ramosissimumMycologia 3 (2): 46, 47, 51, 56. 41 (1): 14. Mycotaxon 78: 146.
Homotypic synonym: Oidium ramosissimumMycologia 35 (6): 664. 56 (4): 607. Mycotaxon 78: 146, 150.
Homotypic synonym: Haplotrichum ramosissimumMycotaxon 12 (1): 125, 129. 77: 363. 78: 127, 134, 138, 140, 146, 147, 148, 150. 82: 89.