88 Annals of the Carnegie Museum. 



PERILLA Arduino. 



* P. frutescens (Liniiceus). Perilla. 



Pittsburgh ; spontaneous in old gardens. 



CUNILA Linn^us. 



* C. origanoides (Linnaeus). American dittany. 

 C. Mariana Linnaeus. 



KCELLIA Mcench. 

 PYCNANTHEMUM Michaux. 



* K. Virginiana (Linnaeus). Virginia mountain-mint. 

 P. lanceohitiim Pursh. 



Hulton, August i, 1888. Dr. Adolph Koenig. 



* K. flexuosa (Walker). Narrow-leaved mountain-mint. 

 P. linifolium Pursh. 



Sterrett Township, near Edgewood, August, 1885. C. C. Mellor. 



* K. verticillata (Michaux). Torrey's mountain-mint. 

 P. Torreyi Bentham. 



Fawn Township, Branch of Bull Creek, near Schoolhouse No. 2, 

 August, 1900. 



* K. incana (Linnaeus). Hoary mountain-mint. 



CLINOPODIUM Linnaeus. 

 CALAMINTHA Mcench. 



* C. vulgare Linnaeus. Wild basil. 

 C. Clinopodiiiin Bentham. 



MELISSA Linnaeus. 



* M. officinalis Linnaeus. Lemon balm. 



HEDEOMA Persoon. 

 H. pulegioides (Linnaeus). American pennyroyal. 



