1. Bremer, B. and Eriksson, T., 2009. Time tree of Rubiaceae: phylogeny and dating the family, subfamily, and tribes. International Journal of Plant Sciences, 170, pp.76-793 https://doi.org/10.1086/599077
2. Davis, A. and Bridson, D., 2003. Introduction in the Rubiaceae. in S.M. Goodman, J.P. Benstaed (eds). The Natural History of Madagascar. Univ. Chicago Press, Chicago and London. pp.431-434
3. eFloras., 2008. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. http://www.efloras.org (last accessed: February 22, 2008)
4. Forster, J.R. and Forster, G., 1775. Characteres Generum Plantarum. Londini, Proftant apud B. White, T. Cadell & P. Elmsly, 150, pp https://doi.org/10.5962/bhl.title.4448
5. GBIF., 2020., GBIF Backbone Taxonomy. https://www.gbif.org/species/(last accessed: January 13, 2020)
6. Groeninckx, I., Dessein, S. and Ochoterena, H., et al., 2009. Phylogeny of the herbaceous tribe Spermacoceae (Rubiaceae) based on plastid DNA data. Annals of the Missouri Botanical Garden, 96(1), pp.109-132 https://doi.org/10.3417/2006201
7. Hepper, F.N. and Keay, R.W.J., 1963. Rubiaceae. In: Hepper F.N. (ed.), Flora of West Tropical Africa, Crown Agents for Oversea Governments and Administrations, London, 2nd ed. 2, pp.104-223
8. Hiern, W.P., 1877. Order LXX. Rubiaceae. In: Oliver D. (ed.), Flora of Tropical Africa, L. Reeve & Co. Ltd., London, 3, pp.33–247
9. Hooker, J.D., 1880. Tribe X. Vanguerieae. In: Hooker J.D. (ed.), Flora of British India, L. Reeve & Co. Ltd., London, 3, pp.131–137
10. JSTOR, 2020. JSTOR Global Plants. Ithaka. <https://plants.jstor.org/>, accessed 28 July 2020
11. Jussieu, A.L. de, 1789. Antonii Laurentii de Jussieu Genera plantarum: secundum ordines naturales disposita, juxta methodum in Horto regio parisiensi exaratam, anno M.DCC.LXXIV (Gen. Pl. [Jussieu] 196. 1789) https://doi.org/10.5962/bhl.title.284
12. Kårehed, J. and Bremer, B., 2007. The systematics of Knoxieae (Rubiaceae)–molecular data and their taxonomic consequences. Taxon, 56, pp.1051-1076 https://doi.org/10.2307/25065904
13. Mabberley, D.J., 2017. Mabberley’s Plant Book: A portable dictionary of plants, their classification and uses. 4th Edition. Cambridge University Press, Cambridge. pp. xix+1102 https://doi.org/10.1017/9781316335581
14. Naik, M.C. and Rao, B.P., 2017. Flora of South Andaman Islands, India. In: Nehra, S. et al. (eds) Biodiversity in India: Assessment, Scope and Conservation. Lambert Academic Publishing Heinrick-Booking-Str. Sarbruken, Germany
15. Naik, M.C. and Singh, L.J., 2020. Diversity and Conservation of Rubiaceae of Andaman and Nicobar Islands, India. In: International Symposium on Plant Taxonomy and Ethnobotany, BSI, Kolkata, pp.87
16. Naik, M.C., Arriola, A.H. and Bheemalingappa, M., 2020. Pyrostria laljii, a new species and first record of Pyrostria (Vanguerieae, Rubiaceae) from Andaman and Nicobar Islands, India. Annales Botanici Fennici, 57, pp.335-340 https://doi.org/10.5735/085.057.0416
17. Naik, M.C., Singh, L.J. and Ekka, G.A., 2020c. Oldenlandia umbellata L. (Rubiaceae): An Addition to the Flora of Andaman and Nicobar Islands, India. Indian Journal of Forestry, 43(2), pp.127-129
18. Naik, M.C., Singh, L.J. and Ganeshaiah, K.N., 2020. Floristic Diversity and Analysis of South Andaman Islands (South Andaman District), Andaman and Nicobar Islands, India. Species, 21(68), pp.343-409
19. Pitard, J., 1924. Rubiacées. In: Lecomte, M.H., Hunbert, H., Gagnepain, F. (eds), Flore Générale de l’Indo-Chine, 3,pp. 20-442. Masson & Cie Éditeurs, Paris
20. POWO, 2019. Plants of the World Online. - Facilitated by the Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/ (last accessed: May 1, 2021)
21. Puff, C., Chayamarit, K. and Chamchumroom, V., 2005. Rubiaceae of Thailand, a pictorial guide to indigenous and cultivated genera:122–123. Forest Herbarium, National Park Wildlife and Conservation Service, Bangkok
22. Razafimandimbison, S.G. and Manjato, N., 2019. First record of Dentella repens (Rubiaceae) from Madagascar. Candollea, 74(1), pp.43–45 https://doi.org/10.15553/c2019v741a6
23. Razafimandimbison, S.G., Rydin, C. and Bremer, B., 2008. Evolution and trends in the Psychotrieae alliance (Rubiaceae): A rarely reported evolutionary change from many-seeded carpels from one-seeded carpels. Molecular Phylogenetics and Evolution, 48, pp.207–223 https://doi.org/10.1016/j.ympev.2008.03.034
24. Roxburgh, W., 1832. Flora Indica, Serampore
25. Ruhsam, M., Govaerts, R. and Davis, A.P., 2008. Nomenclatural changes in preparation for a World Rubiaceae Checklist. Botanical Journal of the Linnean Society, 157, pp.115–124 https://doi.org/10.1111/j.1095-8339.2008.00779.x
26. Santapau, H. and Henry, A.N., 1973. A Dictionary of the Flowering Plants in India. Council of Scientific and Industrial Research, New Delhi, pp. 83
27. Singh, L.J. and Ranjan, V. (eds), 2021. New Vistas in Indian Flora Vol. 1 & 2, Bishen Singh Mahendra Pal Singh, Dehra Dun, Uttarakhand, India, pp. 417 & 819
28. Singh, L.J., Murugan, C. and Singh, P., 2014. Plant genetic diversity of endemic species in the Andaman and Nicobar Islands. In: National Conference on Islands Biodiversity, U.P. State Board Biodiversity Board, Lucknow, pp.49–57
29. Singh, L.J., Ranjan, V., Sinha, B.K. et al., 2021. An Overview of Phytodiversity of the Andaman and Nicobar Islands, India. New Vistas in Indian Flora, 2, pp.381-399
30. Subramanyam, K. and Sharma, V.S., 1969. The Genus Dentella J.R., G. Forst (Rubiaceae) in India. Bulletin of the Botanical Survey of India, 10, pp.386-390
31. Terrell, E.E. and Robinson, H., 2007. Seed and capsule morphology in six genera of Hedyotideae (Rubiaceae): Thecagonum, Neanotis, Dentella, Kohautia, Pentodon and Oldenlandiopsis. Journal of the Botanical Research Institute of Texas, 1, pp.373–384
32. The Herbarium Catalogue., 2021. Royal Botanic Gardens, Kew. http://www.kew.org/herbcat (last accessed: May 1, 2021)
33. The Plant List, 2013. Version 1.1. http://www.theplantlist.org/(last accessed: January 1, 2013)
34. Verdcourt, B., 1983. Notes on Mascarenes Rubiaceae. Kew Bulletin, 37, pp.567 https://doi.org/10.2307/4109725
35. Verdcourt, B., 1987. Notes on African Rubiaceae: Vanguerieae. Kew Bulletin, 42, pp.123-199 https://doi.org/10.2307/4109900
36. Verdcourt, B. and Bridson, D., 1991. Rubiaceae, part 3. In: Polhill, R.M. (ed.), Flora of Tropical East Africa, A.A. Balkema, Rotterdam, 3, pp. 861-885
37. Willis, J.C., 1966. A dictionary of the flowering plants and ferns. (revised by H.K. Airyshaw) Cambridge: University Press
38. WCSP., 2012. World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. http://wcsp.science.kew.org/ (last accessed: April 3, 2017)