Elaphoglossum scalpellum T.Moore,

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 : 11

7.1. Elaphoglossum scalpellum T.Moore, Index Fil. (T.Moore) 3: 14 (1857). Fig. 4a

Plants rupicolous. Stem short-creeping, with linear-lanceolate scales, 1.7–9.5 mm long, pale brown. Fronds 16.5–27.3 cm long, monomorphic; petiole 6–9.6 cm long, paleaceous, adaxially sulcate, with linear to linear-lanceolate scales and sparse stellate scales abaxially; laminae 11–16.5 × 3.6–4.7 cm, simple, oblong to lanceolate, chartaceous to coriaceous, with sparse stellate scales and irregularly divided lanceolate scales abaxially, glabrous adaxially, margin thickened, cartilaginous, base cuneate to decurrent, apex cuneate to rounded; veins free. Sori not observed.

Examined material: Alto ParnaÍba, PNNRP, 10°10’10’’S, 45°55’27’’W, 21.IV.2022, P. H. C. Aguiar et al. 48 ( CCAA); trilha em direção a Cachoeira do Sussuapara , 10°10’10’’S, 45°55’27’’W, 15.XII.2022, P. H. Castro-Aguiar et al. 172 ( CCAA) .

Elaphoglossum scalpellum is endemic to Brazil and is recorded for the states of Amazonas, Roraima, Tocantins, Bahia, Maranhão, PiauÍ, Distrito Federal, Goiás, Mato Grosso, Minas Gerais, and São Paulo, in the Amazon and Cerrado biomes ( Fernandes et al. 2022; Matos 2023). A few sterile individuals were discovered in the study area, growing on rock formations inside the gallery forest.

Elaphoglossum scalpellum belongs to Elaphoglossum section Elaphoglossum , which is generally characterized by the presence of phyllopodia and glabrous laminae or inconspicuously scaled ( Rouhan et al. 2004). Elaphoglossum scalpellum is characterized by its creeping rhizome with brown-orange scales, laminae with a strongly coriaceous consistency, attenuated base, and apex rounded to acute.

Figures

Figure 4 – a.Elaphoglossum scalpellum – habit.b-c.Dicranopteris flexuosa – b. habit; c. sori on the abaxial surface.d.Trichomanes pilosum – habit. e. Trichomanes pinnatum – habit. f. Lindsaea divaricata – habit. g. Lindsaea lancea – habit. h-i. Metaxya parkeri – h. babit; i. sori on the abaxial surface. (a. P.H. Castro-Aguiar et al. 172; b-c. P.H. Castro-Aguiar et al. 67; d. P.H. Castro-Aguiar et al. 238; e. P.H. Castro-Aguiar et al. 173; f. P.H.C. Aguiar et al. 8; g. P.H.C. Aguiar et al. 28; h-i. P.H. Castro-Aguiar et al. 165).