Glime, J. M. and Wagner, D. H. 2017. Herbarium Methods and Exchanges. Chapt. 3-1. In: Glime, J. M. Bryophyte Ecology. 3-1-1 Volume 3. Methods. Ebook sponsored by Michigan Technological University and the International Association of Bryologists. Ebook last updated 10 April 2021 and available at <http://digitalcommons.mtu.edu/bryophyte-ecology/>. CHAPTER 3-1 HERBARIUM METHODS AND EXCHANGES Janice M. Glime and David H. Wagner TABLE OF CONTENTS Folding Packets.......................................................................................................................................................................3-1-2 Packet Machine...............................................................................................................................................................3-1-4 Followers........................................................................................................................................................................3-1-5 Herbarium Sheets............................................................................................................................................................3-1-6 Herbarium Labels ...................................................................................................................................................................3-1-6 Multiple Species..............................................................................................................................................................3-1-6 Annotations.....................................................................................................................................................................3-1-8 Multiple Access ..............................................................................................................................................................3-1-8 Storage....................................................................................................................................................................................3-1-9 Cabinets..........................................................................................................................................................................3-1-9 Packet storage.................................................................................................................................................................3-1-9 Type Specimens............................................................................................................................................................3-1-10 Storage Containers........................................................................................................................................................3-1-11 Palm Folders.................................................................................................................................................................3-1-11 Storage Boxes from Genus Covers...............................................................................................................................3-1-12 Specially Made Storage Boxes......................................................................................................................................3-1-13 Preservation..................................................................................................................................................................3-1-14 Cool Preservation..................................................................................................................................................3-1-15 Minute Species and Special Structures.........................................................................................................................3-1-15 Herbarium Arrangement .......................................................................................................................................................3-1-15 Guide Cards..................................................................................................................................................................3-1-15 Herbarium Care.....................................................................................................................................................................3-1-15 Pest Control...................................................................................................................................................................3-1-15 Agral 600..............................................................................................................................................................3-1-16 Moth Balls (Naphthalene).....................................................................................................................................3-1-16 Microwave Oven...................................................................................................................................................3-1-16 Bromomethane (Methyl Bromide)........................................................................................................................3-1-17 Freezing ................................................................................................................................................................3-1-17 Insect Traps...........................................................................................................................................................3-1-18 Drowning..............................................................................................................................................................3-1-18 Steam Sterilization................................................................................................................................................3-1-18 Moisture Control...........................................................................................................................................................3-1-18 Dehumidifier.........................................................................................................................................................3-1-19 Silica Gel...............................................................................................................................................................3-1-19 Herbarium Cabinet Materials................................................................................................................................................3-1-19 Sending Specimens for Identification ...................................................................................................................................3-1-19 References.............................................................................................................................................................................3-1-21 Current Names..............................................................................................................................................................3-1-21 Indexing........................................................................................................................................................................3-1-21 Herbarium Programs.............................................................................................................................................................3-1-22 Shipping Live Bryophytes ....................................................................................................................................................3-1-22 Sharing Images .....................................................................................................................................................................3-1-23 Herbaria ................................................................................................................................................................................3-1-23 Herbarium Specimen Mapping .............................................................................................................................................3-1-23 Live Collections....................................................................................................................................................................3-1-23 Cryopreservation...................................................................................................................................................................3-1-24 When You Depart – Willing Your Herbarium......................................................................................................................3-1-27 Exchange Programs ..............................................................................................................................................................3-1-27 Borrowing Specimens...........................................................................................................................................................3-1-27 Type Specimens............................................................................................................................................................3-1-27 Summary ..............................................................................................................................................................................3-1-27 Acknowledgments ................................................................................................................................................................3-1-27