The Plant List — A working list for all plant species

⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-35119305, with some changes.

M Hypnum rigidissimum Müll. Hal. is a synonym of Isothecium rigidissimum (Müll. Hal.) M. Fleisch.

This name is a synonym of Isothecium rigidissimum (Müll. Hal.) M. Fleisch..

The record derives from Tropicos which reports it as a synonym (record 35119305) with original publication details: Linnaea 36: 16 16 1869.