1. Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
2. Department of Botany, Brahmanand Post Graduate College, Kanpur, India
3. Beaty Centre for Species Discovery and Botany Section, Canadian Museum of Nature, Ottawa, Canada
4. Department of Botany, Kamla Nehru Institute of Physical and Social Sciences, Sultanpur, India