Kalmia L.
Kalmia is a small genus of about ten species, all native to the New World (essentially eastern North America and Cuba). All North American species are cultivated as ornamentals in Europe (Mitchem 1997) but only few are more or less widespread in gardens (mainly Kalmia angustifolia and K. latifolia L.).
Literature:
Ebinger J.E. (1974) The genus Kalmia. Rhodora 76: 315-398.
Holmes M.L. (1956) Kalmia, the American Laurels. Baileya 4: 89-94.
Jaynes R.A. (1988) Kalmia – the Laurel book. Timber Press, Portland: 220 p.
Jaynes R.A. (1997) Kalmia: mountain laurel and related species. 3th ed. Portland, Oregon, Timber Press: 295 p.
Liu S., Denford K.E., Ebinger J.E., Packer J.G. & Tucker G.C. (2009) Kalmia. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 8. Oxford University Press, New York-Oxford: 480-485.
Mitchem C.M. (1997) Kalmia. In: Cullen J. & al. (eds.), The European Garden Flora, vol. 5. Cambridge University Press, Cambridge: 478-479.
Southall R.M. & Hardin J.W. (1974) A taxonomic revision of Kalmia (Ericaceae). J. Elisha Mitchell Sci. Soc. 90(1): 1-23.