Anemia oblongifolia (Cav.) Sw., Syn. Fil. (Swartz)

Castro-Aguiar, Pedro Henrique, Fernandes, Rozijane Santos & Zappi, Daniela Cristina, 2025, Ferns of the Parque Nacional das Nascentes do Rio Parnaíba Brazilian Cerrado, Rodriguesia (e 00612024) 76, pp. 1-24 : 6

1.2. Anemia oblongifolia (Cav.) Sw., Syn. Fil. (Swartz) 156 (1806). Fig. 3b

Plants terrestrial or rupicolous. Stem suberect to erect, with orange hairs. Fronds hemidimorphic, erect, sterile fronds 3–13 cm long, 1-pinnate, fertile fronds 9–15 cm long; larger than the sterile ones and overtaking them, petiole paleaceous, sulcate on the adaxial side, with dense hairs, petiole of sterile fronds 0.3–7.3 cm long, petiole of fertile fronds (4.5–) 6.2–9.2 cm long; rachis paleaceous, with dense hairs; sterile laminae 2.8–14 cm long, oblong, chartaceous to coriaceous; sterile pinnae 0.6–2.2 × 0.3–0.5 cm, 5–11 pairs, oblong, denticulate margins, with whitish hairs on both sides, fertile pinnae inserted immediately below the pair of sterile pinnae, exceeding the sterile portion of the laminae; veins free.

Examined material: Alto ParnaÍba, PNNRP, descida da Galiléia, 10°03’08’’S, 46°22’38’’W, 537 m, 17.III.2023, P. H. Castro-Aguiar et al. 278 ( CCAA); ladeira da Galiléia, 10°03’21’’S, 46°22’51’’W, 578 m, 17.III.2023, P. H. Castro-Aguiar et al. 279 ( CCAA); P. H. Castro-Aguiar et al. 284 ( CCAA); Morro do Cangaia , 9°53’44’’S, 45°44’40’’W, 512 m, 18.III.2023, P. H. Castro-Aguiar et al. 290 ( CCAA, UB, UPCB) .

Anemia oblongifolia is distributed throughout the Neotropical region, occurring from Costa Rica to Brazil ( Mickel 2016), where it occurs in the Amazon, Caatinga, Cerrado , and Atlantic Forest 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 hemidimorphic fronds, oblong sterile pinnae with generally whitish dense hairs on both surfaces, and fertile laminae with elongated petioles, surpassing the sterile fronds. Anemia oblongifolia resembles A. mynsseniana Mickel and Anemia andersonii Mickel & Labiak with its oblong sterile pinnae and fertile fronds with elongated petiole, which surpasses the sterile fronds in length. However, A. mynsseniana presents strongly coriaceous and glabrescent laminae (vs. moderate to densely pubescent laminae in A. oblongifolia ). Furthermore, A. andersonii presents a larger number of pinnae, between (8–)11–20 pairs (vs. 5–11 pairs), and laminae that are distally narrowed (vs. laminae that are generally not narrowed at the apex) ( Mickel 2016). Anemia oblongifolia is widely distributed in Brazil, recorded for the Amazon, Caatinga, Cerrado , and Atlantic Rainforest biomes, whilst A. andersonii and A. mynsseniana are recorded only in the Cerrado, with A. mynsseniana endemic to Brazil (Bahia, Distrito Federal, Goiás, Minas Gerais, and Tocantins) ( Labiak 2023).

Figures

Figure 3 – a. Anemia buniifolia – habit. b. Anemia oblongifolia - habit. c. Anemia presliana – habit. d-e. Blechnum areolatum – habit. f.Blechnum asplenioides – habit. g. Telmatoblechnum serrulatum – habit. h. Pteridium esculentum var.harpianum – habit. i. Cyclodium meniscioides – habit. (a. P.H. Castro-Aguiar et al. 280; b. P.H. Castro-Aguiar et al. 290; c. P.H. Castro-Aguiar et al. 170; d. P.H.C. Aguiar et al. 21; e. P.H. Castro-Aguiar et al. 171; f. P.H. Castro-Aguiar et al. 168; g. P.H.C. Aguiar et al. 05; h. P.H. Castro-Aguiar et al. 243; i. P.H. Castro-Aguiar et al. 160).