Pityrogramma calomelanos

Pityrogramma calomelanos (L.) Link

Family : Pteridaceae

Terrestrial herb with erect, densely scaly rhizome 4 x 2 cm. Scales 2-6 x 0.2-0.5 mm, brownish, linear, entire. Fronds 80-100 x 20-22 cm, bipinnate; stipe 40-50 cm, dark-pinkish brown, polished; lamina triangular in outline; pinnae 11 x 2.5 cm, lanceolate, acuminate in outline, pinnules 1.5 x 0.7 cm, rhomboidal to lanceolate, acute, lobed to serrate, pinnae and pinnules progressively reduced to apex, rachis and costa grooved above, raised below; lower surface of pinnules white crusted. Sori acrostichoid. Sporangial capsule 275-312.5 x 250 µm, globose, stalk 250 µm long. Spores 50 x 50 µm, triangular in outline, yellowish with pinkish thickenings.