Primary references

• Schmidt, J.A. in Mart. (ed.) 1858. Fl. Bras. 8(1): 67, 69

Additional references

• Paton, A.J. 1997. Classification and Species of Platostoma and Its Relationship with Haumaniastrum (Labiatae). Kew Bulletin 52(2): 257–292. JSTOR Reference page. 

• Paton, A.J., Springate, D., Suddee, S., Otieno, D.F., Grayer, R.J., Harley, R.M., Willis, F., Simmonds, M.S.J., Powell, M. & Savolainen, V. 2004. Phylogeny and evolution of basils and allies (Ocimeae, Labiatae) based on three plastid DNA regions, Molecular Phylogenetics and Evolution 31(1): 277–299. DOI: 10.1016/j.ympev.2003.08.002. Reference page. 

• Suddee, S., Paton, A.J. & Parnell, J.A.N. 2005. Taxonomic Revision of Tribe Ocimeae Dumort. (Lamiaceae) in Continental South East Asia III. Ociminae. Kew Bulletin 60(1): 3–75. JSTOR Reference page. 

• Otieno, D.F., Balkwill, K., Paton, A.J. & Savolainen, V. 2006. A Reassessment of Hemizygia and Syncolostemon (Ocimeae-Lamiaceae). Taxon 55(4): 941–958. DOI: 10.2307/25065688 ResearchGate Reference page. 

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