Didymochlaena truncatula (Sw.) J.Sm.

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 : 199

Didymochlaena truncatula (Sw.) J.Sm.

Figure 6B

Examined material. BRAZIL • 1 specimen; Trilha da Estrada ; 25°17′17″S, 048°38′40″W; alt. 100 m; 2 Mar. 2005; F.B. Matos & U. Ferreira 481 leg.; UPCB3716 • 1 specimen; Trilha do Meio ; 25°14′38″S, 048°39′13″W; alt. 200 m; 28 May 2006; F.B. Matos & M.C. Gomes 1188 leg.; UPCB3717 • 1 specimen; Trilha Porto do Rio Seco ; 25°24′19″S, 048°40′54″W; alt. 15 m; 25 Jun. 2019; F.B. Matos & V. Veiga 2668 leg.; UPCB44501 .

Identification. Characterized by massive, scaly, erect stems, 2-pinnate leaves up to 1.5 m long, subdimidiate pinnules that are sessile and obtuse, basal acroscopic pinnules overlapping the rachis, and minute spine-like projections on the upper surface of the junctures of the rachis, costae, and costules. Sori elongate, on both sides of the vein, indusia attached to vein along medial line. Not easily confused with any other fern from the area.

Distribution and habitat. Pantropical. Terrestrial in forests.

Order Polypodiales (suborder Polypodiineae ), Dryopteridaceae Herter