Usnea fragilescens var. mollis
Literature
| Authors | Title |
Year of Publication |
|---|---|---|
| P.W. James; P. Clerc; O.W. Purvis | Usnea | 2009 |
| T. Randlane; T. Tõrra; A. Saag; L. Saag | Key to European Usnea species | 2009 |
| P. Clerc | Systematics of the Usnea fragilescens aggregate and its distribution in Scandinavia | 1987 |