1. CLARKE, C.B. 1876. Compositae Indicae: Descriptae et Secus Genera Benthamii Ordinate. Thacker, Spink & Co., Calcutta.
2. CHANDRASEKARAN, V. 1987. Compositae. In: A.N. HENRY, G.R. KUMARI AND V. CHITHRA (eds.), Flora of Tamil Nadu, India. Ser. I: Analysis 2. Botanical Survey of India, Coimbatore. pp. 28–55.
3. GAMBLE, J.S. 1921. Flora of Presidency of Madras (Vol. 1–3). Adlard & Son, London.
4. FUNK, V.A., A. SUSANNA, T.F. STUESSY AND H. ROBINSON 2009. Classification of Compositae, in Systematic Evolution and Biogeography of Compositae. In: Funk, V.A., A. Susanna, T.F. Stuessy and R.J. Bayer. Internation Association of Plant Taxonomy. Vienna. Austria.
5. IUCN 2019. Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee of the IUCN Species Survival Commission. Available at: http://www.iucnredlist.org/documents/RedListGuidelines.pdf