| _version_ | 1866901939233488896 |
|---|---|
| author | Castro-Aguiar, Pedro Henrique Fernandes, Rozijane Santos Zappi, Daniela Cristina |
| author_facet | Castro-Aguiar, Pedro Henrique Fernandes, Rozijane Santos Zappi, Daniela Cristina |
| contents | <p><b>2.2. <i>Blechnum asplenioides</i> Sw., Kongl. Vetensk. Acad. Handl. 72, t.3, f.3 (1817). Fig. 3f</b></p><p>Plants terrestrial or rupicolous. Stem erect, scales lanceolate, 2.1–2.6 mm long, pale brown to blackish. Fronds (3.4–) 4.1–10.2 cm long, monomorphic; pinnatisect, petiole 4–9 mm long, paleaceous, adaxially sulcate, with scales at the base similar to those on the stem; rachis adaxially sulcate, with scales at the base and sparse hairs abaxially, scales similar to those on the stem; laminae 3.6–9.7 × 0.8–1.2 cm, linear-lanceolate, gradually narrowed towards the base, forming semicircular lobes; pinnae 5–7 × 4–5 mm, 5–21 pairs, triangular, chartaceous, with sparse diminutive hairs mainly beneath the basal pinnae, which is adnate to the rachis, median and apical pinnae ascending with entire to slightly denticulate margins, apex rounded to subacute; veins free. Sori linear, parallel to the costae; indusia linear, introrse.</p><p><b>Examined material</b>: Alto ParnaÍba, PNNRP, Cachoeira do Sussuapara, 10°09’56’’S, 45°55’38’’W, 422 m, 21.IV.2022, <i>P. H. C</i><i>.</i> <i>Aguiar et al. 30</i> (CCAA, UB); 15.XII.2022, <i>P. H</i><i>.</i> <i>Castro-Aguiar et al. 168</i> (CCAA); <i>P. H</i><i>.</i> <i>Castro-Aguiar et al. 180</i> (CCAA); <i>P. H</i><i>.</i> <i>Castro-Aguiar et al. 235</i> (CCAA).</p><p><i>Blechnum asplenioides</i> is a South American species, occurring from the region of the Guianas to Argentina (Dittrich <i>et al.</i> 2015). In Brazil, it occurs in the Amazon, <i>Cerrado</i>, Atlantic Rainforest, and Pampa biomes (Dittrich <i>et al.</i> 2015; Dittrich & Gasper 2023). This is the first record of this species for the state of Maranhão, where it was collected in the PNNRP on the shore of the Sussuapara waterfall, forming large populations on humid rocks close to waterfalls.</p><p><i>Blechnum asplenioides</i> is characterized by the pinnatisect frond, gradually narrowed in the direction of the base, with the first pinnate pair adnate to the rachis, forming semicircular lobes, and medium pinnae ascending distally.</p><p><i>Blechnum asplenioides</i> resembles <i>B.polypodioides</i> Raddi, which also occurs in the Brazilian <i>Cerrado</i>. The two species have pinnatisect fronds, gradually narrowed in the direction of the base. However, in <i>B. polypodioides</i> the basal pinnae are generally surcurrent with an acute apex, while <i>B. asplenioides</i> presents semicircular basal pinnae with a rounded apex (Dittrich <i>et al.</i> 2015).</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_15527118 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Blechnum asplenioides Sw., Kongl Castro-Aguiar, Pedro Henrique Fernandes, Rozijane Santos Zappi, Daniela Cristina Biodiversity Taxonomy Plantae Tracheophyta Polypodiopsida Polypodiales Blechnaceae Blechnum Blechnum asplenioides <p><b>2.2. <i>Blechnum asplenioides</i> Sw., Kongl. Vetensk. Acad. Handl. 72, t.3, f.3 (1817). Fig. 3f</b></p><p>Plants terrestrial or rupicolous. Stem erect, scales lanceolate, 2.1–2.6 mm long, pale brown to blackish. Fronds (3.4–) 4.1–10.2 cm long, monomorphic; pinnatisect, petiole 4–9 mm long, paleaceous, adaxially sulcate, with scales at the base similar to those on the stem; rachis adaxially sulcate, with scales at the base and sparse hairs abaxially, scales similar to those on the stem; laminae 3.6–9.7 × 0.8–1.2 cm, linear-lanceolate, gradually narrowed towards the base, forming semicircular lobes; pinnae 5–7 × 4–5 mm, 5–21 pairs, triangular, chartaceous, with sparse diminutive hairs mainly beneath the basal pinnae, which is adnate to the rachis, median and apical pinnae ascending with entire to slightly denticulate margins, apex rounded to subacute; veins free. Sori linear, parallel to the costae; indusia linear, introrse.</p><p><b>Examined material</b>: Alto ParnaÍba, PNNRP, Cachoeira do Sussuapara, 10°09’56’’S, 45°55’38’’W, 422 m, 21.IV.2022, <i>P. H. C</i><i>.</i> <i>Aguiar et al. 30</i> (CCAA, UB); 15.XII.2022, <i>P. H</i><i>.</i> <i>Castro-Aguiar et al. 168</i> (CCAA); <i>P. H</i><i>.</i> <i>Castro-Aguiar et al. 180</i> (CCAA); <i>P. H</i><i>.</i> <i>Castro-Aguiar et al. 235</i> (CCAA).</p><p><i>Blechnum asplenioides</i> is a South American species, occurring from the region of the Guianas to Argentina (Dittrich <i>et al.</i> 2015). In Brazil, it occurs in the Amazon, <i>Cerrado</i>, Atlantic Rainforest, and Pampa biomes (Dittrich <i>et al.</i> 2015; Dittrich & Gasper 2023). This is the first record of this species for the state of Maranhão, where it was collected in the PNNRP on the shore of the Sussuapara waterfall, forming large populations on humid rocks close to waterfalls.</p><p><i>Blechnum asplenioides</i> is characterized by the pinnatisect frond, gradually narrowed in the direction of the base, with the first pinnate pair adnate to the rachis, forming semicircular lobes, and medium pinnae ascending distally.</p><p><i>Blechnum asplenioides</i> resembles <i>B.polypodioides</i> Raddi, which also occurs in the Brazilian <i>Cerrado</i>. The two species have pinnatisect fronds, gradually narrowed in the direction of the base. However, in <i>B. polypodioides</i> the basal pinnae are generally surcurrent with an acute apex, while <i>B. asplenioides</i> presents semicircular basal pinnae with a rounded apex (Dittrich <i>et al.</i> 2015).</p> |
| title | Blechnum asplenioides Sw., Kongl |
| topic | Biodiversity Taxonomy Plantae Tracheophyta Polypodiopsida Polypodiales Blechnaceae Blechnum Blechnum asplenioides |
| url | https://doi.org/10.5281/zenodo.15527118 |