Bicknell : Teucrium in Eastern United States 167 



ample of T. occidentale Gray from as far east as Lake Ontario. A 

 detailed study of the whole subject gave the very unexpected re- 

 sult that six species instead of two are to be credited to our east- 

 ern flora. 



In these circumstances it becomes necessary before pursuing 

 the subject further to inquire into the exact significance of the 

 Linnaean names T. Canadense and T. Virginicum, both applied to 

 plants of the Eastern United States. In Species Plantarum we 

 find that the former species was based primarily on the Chamacdrys 

 Canadensis of Tournefort and that under it a specimen of Grono- 

 vius* is also cited, but with a mark of doubt. The T. Virginicum 

 was based alone on a Gronovian species. 



* 



When in London three years ago, Professor Underwood kindly 

 undertook to look into the matter of the Linnaean types. The 

 specimen underlying T. Virginicum was searched for with the as- 

 sistance of Mr. Britten both in the British Museum and at the 

 Linnaean Society rooms ; it was not to be found and is probably 

 not now in existence. 



The specimen doubtfully cited by Linnaeus under his T. Cana- 

 dense was, however, brought to light at the British Museum. It 

 proved to be M wholly unsatisfactory" and was regarded both by 

 Mr. Britten and Professor Underwood as a pathological plant. 

 However, from the careful notes and sketches of the leaves made 

 by Professor Underwood I have little doubt that the specimen is 

 actually our common coastwise plant. On the other hand Tourne- 

 fort's description of his Chamaedrys Canadensis, the actual type of 

 the Linnaean species, although unsatisfactory, points with reason- 

 able certainty to our common inland species ; his words " urtice 

 folio subtus incano " apply with ready appropriateness to this plant 

 while scarcely to be suggested by the narrow-leaved coast form. 

 The name T. Canadense, therefore, while not wholly free from un- 

 certainty now that six species present themselves, may fairly be 

 retained for our more inland plant, and fortunately so since this 

 species being the most widely distributed and commonest of all 

 m ay be accepted as the one for which the name has been more 

 especially used. 



As to T. Virginicum of Linnaeus the evidence deducible from 

 the words of Gronovius, all that remains to us, allows scarcely a 



