Six methods of storage
of vouchers are used:
Dried plant organs are stored in paper envelopes located in cardboard and plastic boxes.
Succulent or fleshy
plant organs are stored in jars containing a solution of 5-12% formaldehyde in water or 30-50%
alcohol with a small amount of glycerin added
Intact spores are stored
on microscope slides in a drop of glycerin or lactic acid. The slides are
placed in Petri dishes.
Spores and other fungal structures are permanently mounted on microscope slides in both
polyvinyl alcohol-lactic acid-glycerin (PVLG) and PVLG mixed with Melzer’s reagent (1:1 v/v). At present, over 3000 slides are stored. The slides are stored in numbered boxes. Each box has a reference number corresponding with a given described or undescribed species. These numbers correspond with the numbers of microscopic slides, vials, and photographs.
Mycorrhizal roots are preserved in PVLG and vials with ethanol.