Hymenophyllum elegans Spreng.

Matos, Fernando B., Bohn, Amabily & Labiak, Paulo H., 2020, The ferns and lycophytes of Reserva Natural Guaricica, Antonina, Paraná, Brazil, Check List 16 (1), pp. 183-206 : 193

Hymenophyllum elegans Spreng.

Figure 4E

Examined material. BRAZIL • 1 specimen; Trilha do Gervásio ; 25°14′39″S, 048°39′59″W; alt. 300 m; 25 Mar. 2006; F.B. Matos et al. 1117 leg.; UPCB5356 • 2 spec- imens; Trilha do Mirante ; 25°14′25″S, 048°39′55″W; alt. 250 m; 25 Mar. 2006; F.B. Matos et al. 1121 leg.; CEPEC118539, RB648457 • 1 specimen; Morro do Quei- mado; 25°23′10″S, 048°42′19″W; alt. 300 m; 12 Jun. 2019; F.B. Matos et al. 2637 leg.; UPCB43865 .

Identification. Characterized by filiform stems ca 0.2 mm in diameter, pendent leaves up to 8 cm long, nonalate petioles, and linear to lanceolate blades that are 1-pinnate-pinnatifid at base, pinnae mostly adnate, and rachis not alate at base. Also characteristic is the presence of simple, forked or stellate hairs on the leaf. Sori marginal, round, indusia consisting of two lobes. Other hairy species of Hymenophyllum , such as H. fragile , H. hirsutum and H. pulchellum , differ by petiolulate pinnae (at least the lower pairs) or rachises alate to base.

Distribution and habitat. Neotropical. Epiphytic or epipetric in forests.