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 ** Odontoschisma variabile (Lindenb. & Gottsche) Trevis. Material examined. BRAZIL • Maranhão , Parque Nacional Chapada das Mesas , Cachoeira do Dodô , rupícola; 07°05′S , 047°26′W ; alt. 234 m ; 5 Feb. 2020 ; JAS Silva 512; CCAA 2343 . Maranhão , Parque Nacional Chapada das Mesas , Constância Ecológica, Vereda Bonita, corticícola, próximo à queda d’água; 07°03′S , 047°15′W ; alt. 191 m ; 5 Feb. 2020 ; JAS Silva 497; CCAA 2332 . Identification. Plants pale green. Leafy branches predominantly ventral-intercalary, stolons frequent, sometimes with rudimentary leaves. Leaves distant to imbricate, ovate to oblong-ovate, asymmetric, apex rounded to short bifid, margin frequently incurved, slightly bordered by one row of subquadrate cells; cells isodiametrical-hexagonal, usually becoming smaller towards the margin, trigones usually large, inflated, cuticle papillose. The pantropical–holarctic genus Odontochisma is represented by 21 species, of which five occur in Brazil . Gradstein and Ilkiu-Borges (2015) presented a taxonomic revision of this genus. Description and illustration. Gradstein and Ilkiu- Borges (2015: 72–78, fig. 26). Fossombroniaceae