External links are provided on relevant study materials related to UG Botany courses
Egyankosh Botany : https://egyankosh.ac.in/handle/123456789/53529
IIT Kharagpur : https://ndl.iitkgp.ac.in/he_browse/ddc?ddc%5B%5D=500%2F580
SWAYAM Online Courses : https://swayam.gov.in/explorer
Virtual Labs : https://www.vlab.co.in/
e-PG Pathshala : https://epgp.inflibnet.ac.in/
NSOU : https://www.wbnsou.ac.in/student_zone/e-resources.shtml#active_eresources
Maulana Azad National Urdu University : https://manuu.edu.in/University/e-content-botany
Sarah Tucker College : https://sarahtuckercollege.edu.in/e-resources/6/aaa
Bhairab Ganguly College : https://bhairabgangulycollege.ac.in/academics/e-contentsclass/e-contents-botany/
Uttarakhand Open University :
https://www.uou.ac.in/sites/default/files/slm/BSCBO-101.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-102.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-103.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-104.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-201.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-202.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-203.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-204.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-301.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-302.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-303.pdf
https://www.uou.ac.in/sites/default/files/slm/BSCBO-304.pdf
E-Books
Pdf drive : https://www.pdfdrive.com/
Free ebooks : https://www.free-ebooks.net/
e-library : http://e-library.net/free-ebook.htm
Open library : https://openlibrary.org/
Wikibooks : https://en.wikibooks.org/wiki/Main_Page
Slideshare : https://www.slideshare.net/
E-journal
Indian Academy of Science : https://www.ias.ac.in/
Open access : https://www.openaccessjournals.com/
Elsevier : https://www.elsevier.com/about/open-science/open-access/open-access-journals
Springer Nature : https://www.springernature.com/gp/open-research/journals-books/journals
Oxford : https://academic.oup.com/journals/pages/open_access
DOAJ : https://www.doaj.org/