Diplazium ambiguum Raddi

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 : 197

Diplazium ambiguum Raddi

Figure 5H

Examined material. BRAZIL • 3 specimens; Trilha Rio do Ferro ; 25°18′07″S, 048°40′49″W; alt. 50 m; 16 Jan. 2005; F.B. Matos 210 leg.; MBM333055, RB642975, UPCB2884 • 2 specimens; Trilha dos Fornos; 25°17′38″S, 048°39′25″W; alt. 100 m; 2 Mar. 2005; F.B. Matos & U. Ferreira 477 leg.; RB642992, UPCB2885 • 3 specimens; Trilha do Corvo ; 25°19′39″S, 048°40′26″W; alt. 60 m; 6 Oct. 2005; F.B. Matos & P.B. Schwartsburd 831 leg.; MBM333056, RB642979, UPCB2890 • 2 specimens; Trilha do Gervásio ; 25°14′39″S, 048°39′59″W; alt. 100 m; 27 May 2006; F.B. Matos 1183 leg.; MBM333057, UPCB2889 • 1 specimen; Trilha do Mirante ; 25°14′25″S, 048°39′55″W; alt. 200 m; 12 Sep. 2008; F.B. Matos et al. 1601 leg.; UPCB2950 • 1 specimen; Trilha da Pantera ; 25°18′02″S, 048°38′31″W; alt. 240 m; 29 May 2019; F.B. Matos et al. 2619 leg.; UPCB44395 • 1 specimen; 25°19′30″S, 048°46′30″W; alt. 200 m; 1 Sep. 2006; M.C. Gomes et al. 14 leg.; UPCB2887 • 1 specimen; 25°19′30″S, 048°46′30″W; alt. 100 m; 1 Sep. 2006; M.C. Gomes et al. 32 leg.; UPCB2942 • 1 specimen; same collection data as for preceding; M.C. Gomes et al. 36 leg.; UPCB2900 .

Identification. Characterized by erect, trunk-like stems, 2-pinnate-pinnatifid leaves gradually tapering to a pin- natifid apex, and glabrous abaxial blade surfaces. Sori linear, indusiate, usually paired back to back along a single vein. It is often confused with Diplazium asplenioides (Kunze) C.Presl , which was not recorded in the area and differs by the presence of numerous hairs on abaxial blade surfaces and indusia.

Distribution and habitat. Widely distributed in South America. Terrestrial in forests.

Order Polypodiales (suborder Aspleniineae ), Thelypteridaceae Ching ex Pic.Serm.