⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-35137827, with some changes.
This name is a synonym of Isopterygium albescens var. smallii .
The record derives from Tropicos which reports it as a synonym (record 35137827
) with original publication details: Hedwigia 38: 231 231 1899.