Leafy liverworts of Chapada das Mesas National Park: a floristic survey and checklist of the leafy liverworts of Maranhão state, Brazil Author Silva, Jainara Pereira Laboratório de Sistemática Vegetal, Centro de Ciências Agrárias e Ambientais, Universidade Federal do Maranhão, Chapadinha, MA, Brazil Author Oliveira-da-Silva, Fúvio Rubens Programa de Pós-graduação em Ciências Biológicas, Botânica Tropical, Universidade Federal Rural da Amazônia / Museu Paraense Emílio Goeldi, Belém, PA, Brazil • FROS: oliveira. fuvio @ gmail. com https: // orcid. org / 0000 - 0002 - 4871 - 6740 &): 479 - 495. https: // doi. org / 10.15560 / 17.2.479 Author Ilkiu-Borges, Anna Luiza Museu Paraense Emílio Goeldi, Belém, PA, Brazil • ALIB: ilkiu-borges @ museu-goeldi. br https: // orcid. org / 0000 - 0002 - 1266 - 7211 Author Fernandes, Rozijane Santos Laboratório de Sistemática Vegetal, Centro de Ciências Agrárias e Ambientais, Universidade Federal do Maranhão, Chapadinha, MA, Brazil text Check List 2021 2021-03-11 17 1 479 495 journal article 10.15560/17.1.479 1809-127X 5380155 ** Plagiochila raddiana Lindenb. Figure 3O Material examined. BRAZIL • Maranhão , município de Carolina , Parque Nacional Chapada das Mesas , Rio Farinha , sobre rochas próximo a cachoeira São Romão; 06°59′S , 047°09′W ; alt. 228 m ; 13 Mar. 2017 ; JAS Silva 109; CCAA 1609 . Identification. Plants green to brownish green, dichotomously branched, branches predominantly terminal. Leaves subimbricate, rectangular, 2‒2.5 × longer than wide; apex rounded to subtruncate, margin toothed by 3‒8 teeth near apex, 1 or 2 teeth in lower 1/2 at tip of shoulder, teeth 1–5 cells long, 1–3 cells wide at base, ventral base without teeth, weakly ampliate, conspicuously recurved, forming a low crest (ventral stem surface not completely covered), long decurrent, dorsal leaf base short decurrent; median cells isodiametric to elongate, trigones small, cuticle smooth. Description and illustration. Gradstein and Ilkiu- Borges (2009: 35, fig. 19a–b).