• 'Let's Explore Our Plant Diversity for Present and Future'

Anatomy Section

Anatomy Section

Established in 1977, the section is one of the oldest section of National Herbarium and Plant Laboratories (NHPL), has so far studied the wood anatomy of more than 135 plants species of the country. It continues to serve the Department of Forests for identifying species from the wood samples it confiscates quite often. The section is  publishing a timber identification manual shortly. Anatomical manual of important timbers of Nepal Vol –I is already published and lab work is going on for further volumes. Now, there are more than 500 wood samples and ~ 2700 permanent slides of different woody plants at ‘KATH’ Xylarium. This section also provides wood identification services to District forest offices, traders, farmers, researchers and students.

The study on internal structure of wood helps the species in identification, qualitative and quantitative analysis of wood and fibers.To develop Wood Anatomy as a new tool and identify the problem of burning issue i.e 'Climate Change' in some extent, Anatomy section has started the study of Dendrochronology (Study of tree rings over time) and its other related fields as dendroecology, forest distrubances etc. from the fiscal year 2071-72 (2014-2015).


  • To solve the taxonomic problems through anatomical study.
  • To identify the wood samples coming from Forest offices, traders, researchers, students and so on.
  • To investigate the total timber plants found in Nepal and identify them through anatomical study.
  • To publish Anatomical Manual of important timbers of Nepal successively.
  • To study the relationship between wood parameters and climatic factors along the evevational gradient.
  • To study the past climatic and predict future climatic change through tree ring analysis.

Methodology for anatomical study

  • Literature review of the related subjects.
  • Nationwide survey and collection of the wood samples.
  • Preservation and scientific management of the collected samples.
  • Selection of the wood samples for slide preparation.
  • Softening of the wood samples by boiling.
  • Preparation of the Transverse Section (T.S.), Longitudinal Section (L.S.) and Radial Longitudinal Section through Microtome.
  • Staining and alcohol dehydration of the thin sections through different alcohol series.
  • Preparation of the Permanent Slides.
  • Observing on compound or electric Microscope.
  • Taking photographs.
  • Preparing report or article.

Methodology for Tree Ring Analysis

  • Literature review of the related subjects
  • Site selection and collection of the tree ring samples by borer (annual rings up to core)
  • Preservation of the collected ring samples in poly pipe or straw
  • Mounting of cores  by putting samples in the wood frame
  • Smoothing ring samples by sendar
  • Counting of the rings and measurement of ring width by the help of Lin Tab machine
  • Collect the climatic data of the study site and cross dating
  • Analyzing the rings data with climatic data or in other aspects
  • Preparation of final report or article
Binod Kumar Basnet
Binod Kumar Basnet Chief [ View all officials ]
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