Pollen morphology of Begonia L. (Begoniaceae) in Nepal

Sangeeta Rajbhandary, Mark Hughes, Krishna K. Shrestha


The pollen morphology of 28 Begonia species of Nepal has been examined by scanning electron microscopy (SEM). Comparative pollen analysis was made based on size, shape in polar and equatorial views, P/E ratio, aperture, and exine ornamentation. In this study, four types of pollen ornamentation morphology have been identified. Among Nepalese Begonia, B. roxburghii (section Sphenanthera) has the smallest pollen (11.2- 12.8 × 6.4-7.0 μm) and B. flagellaris (section Diploclinium) has the largest pollen (24.3- 30.6 × 11.4-12.0 μm). Presence of margo in the pollen ornamentation is a distinguishing character that separates Begonia section Platycentrum from all other sections of Nepalese Begonia.

DOI: http://dx.doi.org/10.3329/bjpt.v19i2.13134

Bangladesh J. Plant Taxon. 19(2): 191-200, 2012 (December)


Begonia L.; Nepal; Pollen morphology; SEM

Full Text:


DOI: http://dx.doi.org/10.3329/bjpt.v19i2.13134

Copyright (c)

Impact Factor 2014 of Bangladesh Journal of Plant Taxonomy is 0.696

Indexed by Biological Abstracts; Web of Science; BIOSIS Previews; Journal Citation Reports Science; Science Citation Index Expanded; Current Contents/Agriculture, Biology & Environmental Sciences; ETH-Bibliothek; Ulrich’s Periodical Directories; SCOPUS; Directory of Open Access Journals (DOAJ) and CAB Abstracts