Anemia buniifolia T. Moore, Index

1.1. Anemia buniifolia (Gardner) T.Moore, Index Fil. (T.Moore) 3: cxvi (1857). Fig. 3a Plants terrestrial or rupicolous. Stem erect, compact, with reddish-brown hairs. Frond holodimorphic, erect, sterile frond 1.5–3 cm long, 2–3 pinnate, fertile frond 1.7–6.8 cm long; petiole paleaceous, not sulcate, glabrescent, petiole of sterile frond 0.7–1.3 cm long, petiole of the fertile frond 2–5 cm long; rachis paleaceous, with sparse hairs; sterile laminae 0.7–3.2 cm long, oblongovate, coriaceous; sterile pinnae 4–8 × 0.3–0.5 cm, 2–4 pairs, dichotomically divided, margin entire, glabrescent, fertile pinnae not inserted immediately below the pair of sterile pinnae; veins free. Examined material: Alto ParnaÍba, PNNRP, Ladeira da Galiléia, 10°03’21’’S, 46°22’51’’W, 578 m, 17.III.2023, P. H. Castro-Aguiar et al. 280 (CCAA, UB, UPCB). Anemia buniifolia is distributed throughout South America, occurring in Bolivia, Colombia, Suriname, Venezuela, and Brazil (Mickel 2016), where it occurs in the Amazon and Cerrado biomes (Labiak 2023). Specimens in the study area were recorded in the cerrado rupestre, growing in crevices of the arenitic rocks amidst treelets and shrubs. This species is characterized by its holodimorphic fronds with lax, dichotomous sterile pinnae and fertile fronds, with sporangia found throughout the fertile pinnae that are generally longer than the sterile ones. Anemia buniifolia resembles A. millefolia (Gardner) C. Presl in the holodimorphic fronds, 2–3 pinnate sterile laminae, and segments around 0.5 mm wide (Mickel 2016). However, A. millefolia differs by having strictly pinnate sterile pinnae, with a denser aspect, while in A. buniifolia the sterile pinnae are dichotomous and lax (Mickel 2016; Smith & Kessler 2017a).