References

For Origanum

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. Google Scholar

Ietswaart, J.H. 1980. A taxonomic revision of the genus Origanum. Leiden Univ. Press, The Hague, Netherlands. Google Scholar