KeywordsMosses, cytoskeleton, immunofluorescence, microtubules, meiosis.TEM and immunofluorescence studies of monoplastidic meiosis in cryptogams (Brown and Lem-For TEM, capsules at various stages of development were fixed in 2 % glutaraldehyde + 1 % paraformaldehyde in phosphate buffer (0.05 M, pH 7.4) for 2 h at room temperature, post-fixed in 1 % osmium tetroxide in the same buffer, dehydrated through graded ethanol solutions and propylene oxide, and embedded in Spurr's resin. Ultra-thin sections were sequentially stained with 5 % uranyl acetate I!l 50 % ethanol and lead citrate, and examined in a Philips CM12 electron microscope.Studies on the Sporogenous Lineage in the Moss Timmiella barbuloides VII. Bot. Acta 106 (1993) 351