Plagiochila allionii Steph., Sp. Hepat. 6: 120. 1917, syn. nov.

Holotypus: ECUADOR. Prov. Morona Santiago: Bomboiza, “ad truncos in silvis prope Aguacate”, 2200 m, IV.1910, Allioni 285 (G [G00121503]!) .

= Plagiochila cristata (Sw.) Lindenb.

Notes. – Plagiochila cristata is a robust neotropical species recognized by narrowly elongate-triangular leaves with 1–2 large, apical teeth and a strongly ampliate ventral base forming a high crest (HEINRICHS, 2002). Plagiochila allionii is identical to P. cristata and a synonym.