How to Press and Preserve Plants
- Buy or build a plant press.
- Select your specimen. Tag it in the field and assign it a number. Record the number on the tag and in your field journal, along with notes about where you found it, when, and any other observations that might help with identification.
- Bring the specimen back to the classroom either in a rigid container (to keep it from being crushed) or a plastic bag. A moist paper towel in the container will help prevent the plant from wilting. If you have taken a plant press along, you can proceed with the next steps right in the field.
- To press the specimen, clean up the plant. Brush off loose soil and blot off moisture.
- Arrange the plant on a sheet of newspaper. Next to it, place the identification tag with its name, a number you have assigned to it, the location where it was collected, when it was collected, and by whom. Make sure the same information is in your journal. Place another piece of newspaper on top of the plant.
- Make layers. Place the pieces of newspaper with your specimen inside between two pieces of blotting paper, then between two pieces of corrugated cardboard, to allow air to circulate.
- Place the resulting package in the plant press and gently screw it down. As an alternative, you can hold it securely together with straps, or place some heavy objects (books, bricks) on top.
- You can dry several plants in the press at one time. Each should be arranged in the same layers as described above.
- Check the plants every two or three days, and replace the damp papers with dry ones. It will take from two to four weeks before the specimens are completely dry.
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More About This Resource...
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In this Biodiversity Counts activity, students learn how to press and preserve plant specimens. The online page includes:
- On how to select specimens and take notes about where they were found and other important observations.
- Directions for how to "clean up" and otherwise prepare plants before pressing them.
- Illustrated instructions about how to layer your pressings and maintain them until the specimens have dried.
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Completion Time
Less than 1 period
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Topic
Biology -
Subtopic
Tools and Methods -
Subtopic
National Science Education Standards
• Physical Science CONTENT STANDARD B:• Science and Technology CONTENT STANDARD E:• History and Nature of Science CONTENT STANDARD G:
Grades 9-12:
• Physical Science CONTENT STANDARD B:• Science and Technology CONTENT STANDARD E:• History and Nature of Science CONTENT STANDARD G:
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Learning Standard
National Science Education Standards
• Physical Science CONTENT STANDARD B:• Science and Technology CONTENT STANDARD E:• History and Nature of Science CONTENT STANDARD G:
Grades 9-12:
• Physical Science CONTENT STANDARD B:• Science and Technology CONTENT STANDARD E:• History and Nature of Science CONTENT STANDARD G:
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