Publication Date: 2024/02/07
Abstract: Pityrogramma belonging to the pteridaceae commonly known as Dixie silverback fern is characterised as the terrestrial herb with erect, densely scaly rhizome 4×2 cm. scales 2.6×0.2- 0.5mm, brownish, linear, entire. Fronds 80-100×20-22cm, bipinnate, stipe 40-50cm, dark pinkish brown, polished, lamina triangular in outline, pinnae 11×2.5cm, lanceolate, acuminate, in outline, pinnules 1.5×0.7cm, rhomboid to lanceolate, acute. Lobed to serrate, pinnae and pinnules progressively reduced to apex, rachis and costa grooved above, raised below, lower surface of the pinnules were white crusted. Sori acrostichoid, sporangial capsule 275-312.5×250 μm, globose, stalk 250μm long. Spores are 50×50μm triangular in outline, yellowish with pinkish thickening (Easa 2003). Prothallus of the fern is an essential part in their life. Spores with proper care and maintenance, the various stages of prothallial germination can be noticed.
Keywords: Pityrogramma calomelanos, Prothallus, Gametophyte, Spore.
DOI: https://doi.org/10.5281/zenodo.10629001
PDF: https://ijirst.demo4.arinfotech.co/assets/upload/files/IJISRT24JAN1506.pdf
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