Morphological and phytochemical studies of Plagiochila papillifolia Steph., a Neotropical liverwort new to Europe

The Neotropical liverwort Plagiochila papillifolia Steph. is conspecific with P. caespiticia Spruce ex Herzog (nom. inval.). P. deciduifolia Steph., P. solmsii Steph. and P. verruculosa R.M.Schust.; it is reported from the Azores, ne to Europe, Morphologically it shows affinity with sect, Bidentes Carl, phytochemically, several of its lipophilic secondary metabolites are the same as those of P. retrorsa Gottsche, another Neotropical species reported only recently from Macaronesia.