LITERATURE
- Darlington C. D. and Wylie A. P., 1955. — Chromosome atlas of flowering plants. London, xix-519 pp.
- Darlington C. D., 1963. — Chromosome botany and the origins of Cultivated Plants. London, ix+231 pp.
- Gajapathy C., 1961. — Cytological studies in some Indian medicinal plants. Bull. Bot. Sur. India, 3: 49–51.
- Gadella T. W. J. and Kliphuis K., 1963. — Chromosome numbers of flowering plants in the Netherlands. Acta. Bot. Neepl, 12: 195–230.
- Hooker J. D., 1885. — The flora of British India. Vol. IV.
- Mehra P. N. and Gill L. S., 1968. — In 10PB Chromosome number reports. XVIII. Taxon, 17: 419–422.
- Mukerjee S. K., 1940. — A revision of the Labiatae of the Indian Empire. Ree. Bot. Sur. India, Vol. XIV (1), pp. 228.
- Pigott C. D., 1954. — New Phytol, 53: 4570.
- Reese G., 1952a. — Ber. dtsch. bot. Ges, 64: 241.
- Rutland J. P., 1941. — A list of Chromosome numbers of British Plants. New Phytol, 40: 210–214.
- Scheerer H., 1939. — Planta, 29: 636.
- Strid A., 1965a. — Studies on the Aegean flora VI. Notes on some genera of Labiatae. Bot Not, 118: 104–122.
- Yamane Y., 1950. — Jap. J. Genet, 25: 220.