Pycnoloma rigida (Hook.) C. Chr. = Selliguea rigida (Hook.) Hovenkamp
English:
rigidus,-a,-um;

https://archive.org/stream/#page/76/mode/2up
homotypic synonyms:
Drymoglossum rigidum Hook.; Schizolepton rigidum (Hook.) T. Moore; Selliguea rigida (Hook.) Hovenkamp;

protologue: Dansk Bot. Ark. 6: 76 (1929)

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