Spore morphology of the Siberian Cryptogramma R. Br. ex Richards species

The method of raster electronic microscopy is used to examine the spores of 3 Cryptogramma species inhabiting the Siberian territory. Intersectional and interspecific distinctions in the spore morphology are established. The intersectional distinctions are revealed in the form and outline of spores in polar and equatorial position; the interspecific differences - in the surface character and exosporium sculpture, the size and arrangement of knobs and grooves running between the knobs, the presence of tubercles. In species of Cryptogramma section (C. crispa, С. raddeana) spores in polar position are rounded-triangular, laciniate, with crenate outline; in equatorial position on the distal side -protuberant, on proximal side - concave, rising up along the scars. In a species of Homopteris section (С. stelleri) spores in polar position are triangular-rounded with wavy or almost even outline; in equatorial position - convexo-convex, pyramidal-trihedral on the proximal side.

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