Floristic Geographical Elements of Seed Plants in Nepal and Its Biological Significance

Abstract

Abstract:

On the basis of plant information at large scale in Nepal, this paper discussed the floristic geographical elements of seed
plants and plate belonging. The results showed that 4 870 species of seed plants belonging to 1 403 genera and 221 families of seed
plants were found in Nepal. At genus level, the largest proportion of the distribution type was the pantropical distribution elements
（T2）which was about 17.18%, followed by north temperate elements（T8）, holding 14.75%. At the family level, tropical floristic
element was the major part which was about 68.77%, while the temperate floristic element was only about 23.97%. At the family or
genera level, the seed plant flora of the region was mainly tropical floristics element. However, from family level to genus level, the
proportion of tropical elements decreased from 68.77% to 51.60%, which might be related to the uplift of Himalayan and the reduced
ambient energy caused by the collision of the Indian Plate and the Eurasian Plate.

Key words: phytogroup composition, geographical elements, biogeography, family level, genus level

CLC Number:

Q945.78

Wang Jie, Xu Chengdong, Feng Jianmeng. Floristic Geographical Elements of Seed Plants in Nepal and Its Biological Significance[J]. J4, 2015, 14(12): 75-81.

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