Fissidens bryoides Hedw., Sp. Musc. Frond.

Gomes do Nascimento, Géssica Maria, Mendes da Conceição, Gonçalo, Fernandes Peralta, Denilson & Oliveira, Hermeson Cassiano de, 2019, Bryophytes of Serra da Capivara National Park, Piauí, Brazil, Check List 15 (5), pp. 833-845 : 840

Fissidens bryoides Hedw., Sp. Musc. Frond. 153. 1801.

Materials examined. Table 1. Fig 14.

Identification. Characterized by the absence of hyaline axillary nodules in the stem; unistratose limbidium not confluent with the costa apex in all leaves. Fissidens bryoides resembles F. crispus Mont. by the limbidium of leaves, however, hyaline axillary nodules differenti- ate it from this species, which has larger cells with thick and sinuous walls and generally longer leaves. Habitat: rupicolous and terricolous.

Brazilian range. PE, PR, SP. New record for Caatinga.

Fissidens crispus Mont., Ann. Sci. Nat., Bot. 2 9: 57. 1838.

Materials examined. Table 1.

Identification. Recognized by the presence of hyaline axillary nodules on the stem; oblong-ovate entirely limbate leaves, sometimes crispate when dry; smooth cells with thick walls. Fissidens crispus resembles F. bryoides Hedw. , which has smaller cells without thick walls. Habitat: terricolous.

Brazilian range. AM, BA, CE, DF, ES, GO, MG, PE, PR, RJ, RO, RR, RS, SC, SP, TO.

Fissidens dissitifolius Sull., Ann. Sci. Nat., Bot. 2 9: 57. 1838.

Materials examined. Table 1. Fig. 15.

Identification. Characterized by small flabellate game- tophytes; generally crispate leaves when dry, with lim- bidium throughout the lamina usually ending before the apex. Habitat: rupicolous and terricolous.

Brazilian range. BA, PR, SP. New record for Caatinga.

Fissidens flaccidus Mitt., Trans. Linn. Soc. London 23: 56. 6 f. 18. 1860.

Materials examined. Table 1.

Identification. Identified by flabellate gametophytes; long lanceolate leaves with limidium entirely conflu- ent with the apex; smooth pentagonal or hexagonal cells with sinuous walls. It is similar to Fissidens palmatus Hedw. , which is smaller (generally 2–4 mm alt.), and has cells with straight walls and limbidium not confluent with the apex. Habitat: rupicolous.

Brazilian range. AC, AM, BA, CE, DF, ES, GO, MA, MG, MS, MT, PA, PB, PE, PR, RJ, RO, RS, SE, SP, TO.