For Hedeoma
Harley et al. 2004. In Kadereit, J.W. 2004. The families and genera of vascular plants. VII. Flowering plants – Dicotyledons – Lamiales (except Acanthaceae including Avicenniaceae). Springer, Berlin. 478 pp.
Irving, R.S. 1980. The systematics of Hedeoma (Labiatae). Sida 8: 218-295.
Turner, B.L. 2011. Biological status of Hedeoma drummondii, H. reverchonii (Lamiaceae) and closely related taxa. Phytologia 93: 174-180.
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