Taxon Details: Megalastrum indusiatum R.C.Moran, J.Prado & Labiak
Taxon Profile:
 | The Plant List |
 | International Plant Name Index |
 | Tropicos |
 | Catalogue of Life |
 | Global Biodiversity Information Facility |
 | JSTOR Types |
| JSTOR |
 | BHL |
 | Encyclopedia of Life |
 | WikiSpecies |
 | Google Scholar |
 | PubMed |
 | Morphbank |
 | IUCN |
 | National Center for Biotechnology Information |
 | Barcode of Life |
Multimedia:
Narratives:
Family:
Dryopteridaceae (Pteridophyta)
Dryopteridaceae (Pteridophyta)
Scientific Name:
Megalastrum indusiatum R.C.Moran, J.Prado & Labiak
Megalastrum indusiatum R.C.Moran, J.Prado & Labiak
Primary Citation:
Amer. Fern J. 99: 21-22, Figs. 3B, 5C,. 2009
Amer. Fern J. 99: 21-22, Figs. 3B, 5C,. 2009
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Type Specimens:
Specimen 1: Isotype -- F. B. Matos
Specimen 2: Isotype -- F. B. Matos
Specimen 3: Isotype -- F. B. Matos
Specimen 1: Isotype -- F. B. Matos
Specimen 2: Isotype -- F. B. Matos
Specimen 3: Isotype -- F. B. Matos
Description:
by: R.C. Moran, J. Prado, and P.H. Labiak
Type: Brazil. Bahia: Camacan, RPPN Serra Bonita, 10 km W de Camacan na estrada para Jacarecí, 6 km Sw na estrada para a RPPN e Torres de Transmissão, 15°23'35"S, 39°33'53"W, 750 m, 14 Apr 2007, Matos et al. 1365 (holotype: UPCB; isotypes: CEPEC, NY)
Description: Leaves to 2.0 m long; scales of the petiole bases ca. 2 cm long, linear, sparsely denticulate, light brown, twisted, en masse forming a dense woolly tuft; laminae 1 m long, to 4-pinnate-pinnatifid at base, 2-pinnate-pinnatisect medially; basal pinnae ca. 30-50 cm long, stalks to 2.5 cm long, strongly inequilateral, pinnules acroscopically slightly reduced toward pinna bases; pinna rachises abaxially non-glandular, slightly pubescent, hairs 0.8-1.0 mm long, 4- or 5-celled, scaly, scales ca. 5 mm long, lanceolate, subentire, flat (non-bullate), adaxially densely pubescent, hairs ca. 1 mm long, 3-6-celled, non-glandular; costules abaxially non-glandular, pubescent, hairs 0.3-0.4 mm long, 1-3-celled, scaly, scales ca. 1 mm long, non-bullate, subentire, adaxially pubescent, hairs 0.4-0.8 mm long, 1-3-celled, non-glandular; laminar tissue between veins abaxially non-glandular, pubescent, hairs ca. 0.1 mm long, 1-celled, adaxially non-glandular, hairs absent; veins visible on both surfaces, non-glandular abaxially, minutely scaly and pubescent abaxially, hairs 0.2-0.3 mm long, 1- or 2-celled, scales ca. 0.1-0.3 mm long, uniseriate, reddish, appressed; adaxially sparsely scaly and pubescent, hairs ca. 0.4-0.5 mm long, 1-3-celled, scales like those abaxially; lamina margins ciliate, hairs ca. 0.3-0.4 mm long, 1- or 2-celled; indusia present, circular, dark brown, pubescent, hairs 0.3-0.4 mm long, 1- or 2-celled.
Distribution: Endemic to Bahia, Brazil; 100-800 m.
Comments: Megalastrum indusiatum is characterized by small indusia (about the size of a single sporangial capsule), non-bullate scales on the axes, glabrous tissue adaxially between the veins, and non-glandular axes abaxially (Fig. 8J-O). The laminae typically dry dark brown adaxially. The indusia in M. crenulans are much larger and conspicuous, covering the sori.
by: R.C. Moran, J. Prado, and P.H. Labiak
Type: Brazil. Bahia: Camacan, RPPN Serra Bonita, 10 km W de Camacan na estrada para Jacarecí, 6 km Sw na estrada para a RPPN e Torres de Transmissão, 15°23'35"S, 39°33'53"W, 750 m, 14 Apr 2007, Matos et al. 1365 (holotype: UPCB; isotypes: CEPEC, NY)
Description: Leaves to 2.0 m long; scales of the petiole bases ca. 2 cm long, linear, sparsely denticulate, light brown, twisted, en masse forming a dense woolly tuft; laminae 1 m long, to 4-pinnate-pinnatifid at base, 2-pinnate-pinnatisect medially; basal pinnae ca. 30-50 cm long, stalks to 2.5 cm long, strongly inequilateral, pinnules acroscopically slightly reduced toward pinna bases; pinna rachises abaxially non-glandular, slightly pubescent, hairs 0.8-1.0 mm long, 4- or 5-celled, scaly, scales ca. 5 mm long, lanceolate, subentire, flat (non-bullate), adaxially densely pubescent, hairs ca. 1 mm long, 3-6-celled, non-glandular; costules abaxially non-glandular, pubescent, hairs 0.3-0.4 mm long, 1-3-celled, scaly, scales ca. 1 mm long, non-bullate, subentire, adaxially pubescent, hairs 0.4-0.8 mm long, 1-3-celled, non-glandular; laminar tissue between veins abaxially non-glandular, pubescent, hairs ca. 0.1 mm long, 1-celled, adaxially non-glandular, hairs absent; veins visible on both surfaces, non-glandular abaxially, minutely scaly and pubescent abaxially, hairs 0.2-0.3 mm long, 1- or 2-celled, scales ca. 0.1-0.3 mm long, uniseriate, reddish, appressed; adaxially sparsely scaly and pubescent, hairs ca. 0.4-0.5 mm long, 1-3-celled, scales like those abaxially; lamina margins ciliate, hairs ca. 0.3-0.4 mm long, 1- or 2-celled; indusia present, circular, dark brown, pubescent, hairs 0.3-0.4 mm long, 1- or 2-celled.
Distribution: Endemic to Bahia, Brazil; 100-800 m.
Comments: Megalastrum indusiatum is characterized by small indusia (about the size of a single sporangial capsule), non-bullate scales on the axes, glabrous tissue adaxially between the veins, and non-glandular axes abaxially (Fig. 8J-O). The laminae typically dry dark brown adaxially. The indusia in M. crenulans are much larger and conspicuous, covering the sori.