... bryophytes with firm, small leaf cells that do not collapse in glycerin. I recommend, however, for all-around goodness Glycerin Jelly, an ancient method that has several good points. See: for discussion. Technique with Mniaceae and other large-celled bryophytes: strip leaves in water or Pohlstoffe solution or 2% KOH, then add 2 tiny drops of pure glycerin to the water or solution mount. Do ...