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HERBARIUM
SHEET MOUNTS
HERBARIUM
is a collection of dried
plants systematically
named and arranged for
ready reference and study.
to make a herbarium specimen, the plant is collected, and notes are
made about it.
the plant is then pressed until dry between blotters that absorb
moisture and mounted onto a herbarium sheet with a suitable label.
MOUNTING
The pressed and dried plant is attached to a solid sheet
of paper. Mounting is the process of affixing a dried
pressed plant and its label to a sheet of heavy paper.
This provides physical support that allows the specimen
to be handled and stored with a minimum of damage.
TECHNIQUES
• Strip method -the dry plants are glued to a sheet of paper with
narrow, rubberized paper strips.
• Glue method -the dry plants are glued directly to the paper
sheet with glue.
TECHNIQUES
• ETH method -t he dry plants are glued onto a narrow strip of
paper, which is then glued into a paper envelope.
•Pin method - the dry plants are attached to the paper sheet
with narrow strips of paper and pins.
• Sewing - the dry plants are sewn onto a firm sheet of paper.
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
SPATULA & NEEDLE METHOD
DIP_METHOD
DIP_METHOD
DIP_METHOD
DIP_METHOD
DIP_METHOD
DIP_METHOD
DIP_METHOD
APPLICATION
- Applicable mostly to PLANTS
- some herbaria also include
mosses, algae, fungi or lichens in
archival paper packets, seeds, wood
sections, pollen, microscope slides,
DNA extractions or jars of plant
parts preserved in alcohol or
glycerin.
IMPORTANCE
• It is used to document the plant diversity
of a particular geographic area, as a
reference for identification.
• It is used as a source of information
about plant species (such as the habitats
where they occur, when they flower and
what chemicals they contain).
• It serves as a validation or
documentation of scientific observations
IMPORTANCE
• Also serves as a source of DNA that
facilitates our understanding of the evolution
of plants and the processes by which new
plant species arise.
• It provides information about the species’
morphology while the label offers taxonomic
and locality information.
• Herbaria document the world’s flora and
provide a constant and permanent record of
botanical diversity.
THANK YOU

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HERBARIUM SHEET MOUNTS.pptx

  • 2. HERBARIUM is a collection of dried plants systematically named and arranged for ready reference and study. to make a herbarium specimen, the plant is collected, and notes are made about it. the plant is then pressed until dry between blotters that absorb moisture and mounted onto a herbarium sheet with a suitable label.
  • 3. MOUNTING The pressed and dried plant is attached to a solid sheet of paper. Mounting is the process of affixing a dried pressed plant and its label to a sheet of heavy paper. This provides physical support that allows the specimen to be handled and stored with a minimum of damage.
  • 4.
  • 5. TECHNIQUES • Strip method -the dry plants are glued to a sheet of paper with narrow, rubberized paper strips. • Glue method -the dry plants are glued directly to the paper sheet with glue.
  • 6. TECHNIQUES • ETH method -t he dry plants are glued onto a narrow strip of paper, which is then glued into a paper envelope. •Pin method - the dry plants are attached to the paper sheet with narrow strips of paper and pins. • Sewing - the dry plants are sewn onto a firm sheet of paper.
  • 23. APPLICATION - Applicable mostly to PLANTS - some herbaria also include mosses, algae, fungi or lichens in archival paper packets, seeds, wood sections, pollen, microscope slides, DNA extractions or jars of plant parts preserved in alcohol or glycerin.
  • 24. IMPORTANCE • It is used to document the plant diversity of a particular geographic area, as a reference for identification. • It is used as a source of information about plant species (such as the habitats where they occur, when they flower and what chemicals they contain). • It serves as a validation or documentation of scientific observations
  • 25. IMPORTANCE • Also serves as a source of DNA that facilitates our understanding of the evolution of plants and the processes by which new plant species arise. • It provides information about the species’ morphology while the label offers taxonomic and locality information. • Herbaria document the world’s flora and provide a constant and permanent record of botanical diversity.