C.E.C.Fisch. 1926 - Decades Kewenses. Plantarum Novarum in Herbario Horti Regii Conservatorum. Decas CXV (1926) Decades Kewenses. Plantarum Novarum in Herbario Horti Regii Conservatorum. Decas CXV. Bulletin of Miscellaneous Information (Royal Gardens, Kew) 1926(10): 433. doi: 10.2307/4114286.
There is no corrections for Petrocosmea parryorum yet.