REFERENCES
- Chambers , H. L. 1961 . Chromosome numbers and breeding systems in Pycnanthemum (Labiatae) . Brittonia , 13 ( 1 ) : 116 – 128 .
- Carr , R. K. and Hunter , G. E. 1973 . Flavonoid studies of Pycnanthemum: Labiatae . J. Tennessee Acad. Sci. , 48 ( 1 ) : 2 – 5 .
- Lawrence , B. M. , Morton , J. K. and Chambers , H. L. 1974 . An introduction to the cytology and chemistry of the Pycnanthemum genus (Labiatae) . VIth International Congress of Essential Oils . 1974 , San Francisco. Paper No. 42
- Lawrence , B. M. 1981 . “ Aromatic flora of North America Part I. Labiatae ” . In Essnetial Oils 1979–1980 , Edited by: Lawrence , B. M. 53 – 102 . Carol Stream, IL : Allured Publ Corp .
- Lawrence , B. M. 1982 . “ Addition to the chemical composition of Pycnanthemum essential oils ” . In Cultivation and Utilization of Aromatic Plants , Edited by: Atal , C. K. and Kapur , B. M. 676 – 680 . Jammu-Tawi, , India : Regional Research Laboratory, CSIR .
- Chambers , H. L. personal communication
- Lawrence , B. M. 1978 . A study of the monoterpene interrelationships in the genus Menthus with special reference to the origin of pulegone and menthofuran , PhD Thesis Groningen, , Netherlands : Rijksuniversileit .