how are specimens preserved and pasted on a herbarium sheet
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EQUIPMENT:
The following are the equipments to be used in the specimen collection with mounting on the sheets;
Diggers and pruning knife, Sickle with long handle, vasculum, polythene bags, magazines or newspapers or other mount-over materials, blotting papers, plant press, field notebook, herbarium sheets, glue, labels, small transparent polythene bags.
METHOD OF SPECIMEN COLLECTION AND MOUNTING:
An area is selected for botanical excursion. It is preferable to visit the same site in different seasons. For herbaceous species the entire plant is collected with parts intact.
For others, shoots, flowers, leaves and fruits are selected and cut with the help of pruning knife.
Sickle with long handle is used if the desired twigs are presented at a height. Diggers are used to obtain underground parts like root system, tuber, bulb, corm, rhizome, etc. The collected material can be placed in a polythene bag or vasculum.
Vasculum is a special box with a length of 45-60 cm, depth of 25 cm and width of 20 cm. It keeps the material airtight and prevents wilting till the same is placed inside drying sheets.
The collected specimens are spread over a magazine or newspaper sheets. Care is taken to spread the leaves properly and to speedster the petals so as to expose the essential organs. If the specimen is longer than the sheet, the same can be gently bent in 'n' or 'w' form.
Some of the flowers are kept open so as to facilitate examination of floral parts. Some of the leaves are bent to expose dorsal (under) surface.
Magazine and newspaper sheets are now put inside the press. Plant press contains or consists of two boards with straps for tightening. Details of collection should be jotted down in the field notebook.
For this every collected material is given a number. The details include plant size, branching, root system and specialised underground organ, flower colour, topography and date of collection.
FOR PRESERVATION:
Preservation liquid or Preservative liquid used for storing fleshy organs is FAA (10 ml. Formalin, 5 ml. glacial acetic acid, 50ml. of 95% ethyl alcohol and 35 ml. of water).
Herbarium sheets are pasted with a general size of 30×45 cm. It is slightly shorter than American Herbaria (29×41 cm). Good quality glue is applied to the back of dried specimen and the same is pasted and placed on the Herbarium sheet.
Note: The character limit is coming into play, so have to make it small and understandable. This was a complete procedure guide purely through the means of knowledge in my working on those botanical fields. So, botanically correct :)
The following are the equipments to be used in the specimen collection with mounting on the sheets;
Diggers and pruning knife, Sickle with long handle, vasculum, polythene bags, magazines or newspapers or other mount-over materials, blotting papers, plant press, field notebook, herbarium sheets, glue, labels, small transparent polythene bags.
METHOD OF SPECIMEN COLLECTION AND MOUNTING:
An area is selected for botanical excursion. It is preferable to visit the same site in different seasons. For herbaceous species the entire plant is collected with parts intact.
For others, shoots, flowers, leaves and fruits are selected and cut with the help of pruning knife.
Sickle with long handle is used if the desired twigs are presented at a height. Diggers are used to obtain underground parts like root system, tuber, bulb, corm, rhizome, etc. The collected material can be placed in a polythene bag or vasculum.
Vasculum is a special box with a length of 45-60 cm, depth of 25 cm and width of 20 cm. It keeps the material airtight and prevents wilting till the same is placed inside drying sheets.
The collected specimens are spread over a magazine or newspaper sheets. Care is taken to spread the leaves properly and to speedster the petals so as to expose the essential organs. If the specimen is longer than the sheet, the same can be gently bent in 'n' or 'w' form.
Some of the flowers are kept open so as to facilitate examination of floral parts. Some of the leaves are bent to expose dorsal (under) surface.
Magazine and newspaper sheets are now put inside the press. Plant press contains or consists of two boards with straps for tightening. Details of collection should be jotted down in the field notebook.
For this every collected material is given a number. The details include plant size, branching, root system and specialised underground organ, flower colour, topography and date of collection.
FOR PRESERVATION:
Preservation liquid or Preservative liquid used for storing fleshy organs is FAA (10 ml. Formalin, 5 ml. glacial acetic acid, 50ml. of 95% ethyl alcohol and 35 ml. of water).
Herbarium sheets are pasted with a general size of 30×45 cm. It is slightly shorter than American Herbaria (29×41 cm). Good quality glue is applied to the back of dried specimen and the same is pasted and placed on the Herbarium sheet.
Note: The character limit is coming into play, so have to make it small and understandable. This was a complete procedure guide purely through the means of knowledge in my working on those botanical fields. So, botanically correct :)
DavidOtunga:
After that labelling is done for the specimens which are generally 7×12 cm in size all information has been put on it.
Simultaneously they are covered with tough polymerised substance and presented.
Wow!!!
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