Contribute to your local herbarium by learning how to collect and properly prepare plant voucher specimens.

What is a plant voucher specimen and why is it needed?

A voucher specimen is a representative sample of a plant species that is used for identification and as supporting evidence of information learned during the research process. It is critical that voucher specimens are preserved correctly so that the information they hold is available for long periods of time. As a result, specimens are processed in standardized ways, deposited in internationally recognized herbaria, and referenced within publications as evidence of research. 

Plant classification is constantly changing. Shifts in species alignments and groupings are made as new evidence comes to light. Identifications are subject to change. Vouchers specimens help cross-reference these changes to previous research.

What are the guidelines for collecting and pressing a specimen?

The following "Plant Collecting and Drying" guidelines are provided by the Carnegie Museum's Herbarium.

Tips for Recreational Divers

Where should I send my voucher specimen to?