Presumably the type of Sloanea megaphylla Pittier, although the protologue cites type as Pittier 3919, 9 July 1911. 2 sheets at US of Pittier 3920 (USNH 678999 & 679000) are annotated by Pittier as "Sloanea megaphylla Pittier sp. nov.", with neither sheet annotated as type by Pittier; the type is almost certainly mis-cited in the protologue as Pittier 3919 at US is a type of Hydrangea panamensis Standl.