1 36 Rhodora I'June 



"Lycopus virginicus La Pyl. Herb, non Linn, nee auct. anier. 

 L. uniflorus Mich.^ L. pumilus Vahl. Piirsh Fl. i. p. 16 (?) 

 differt h virginica, radice saepi tuberosa, verticillis paucitioris, 

 calyce 5-non 4-dentate. 



Terra Nova. — La Pylaie dedit Jun. 1828." 



In July, 1839, after the publication of Bentham's monograph, Gay 

 supplemented this label as follows : — 



"Lycopus Virginicus /8 pauciflorus, /j'tv/M. Lab. (1832) p. 185. 

 L. uniliorus Mich. 



Radix tuberosa ! dentes calycini 4, obtusi." 



Thus it is quite clear that by certain European botanists our 

 northern plant recently described as Z. communis was early distin- 

 guished from the more southern L. virginuus. 



The plant described by Bentham as Lycopus macrophyllus ^ and 

 afterward treated by Dr. Gray as a large-leaved form'-' of Z. I'irgimcus, 

 while Z, uniflorus (Z. communis) was treated as a diminutive form^, 

 was collected by Scouler on the Straits of Juan de Fuca (between 

 Washington and Vancouver). The original material in the Hooker 

 Herbarium is identical with the large-leaved plant collected by Lyall 

 on the Oregon Boundary Commission near the 49th parallel of 

 latitude (near the border of Washington and British Columbia), 

 and another distributed by Elihu Hall as no. 395 from Oregon. 

 These plants of Scouler, Lyall, and Hall are clearly a large-leaved 

 phase of the common Z. uniflorus (or Z. communis, which by its 

 author is said to extend west to British Columbia and Oregon). The 

 large-leaved western plant is furthermore inseparable from New 

 England specimens which must represent L. fnemhranacea oi "wet 

 woods"; and since there is good reason to believe that this plant of 

 the East is only a shade-phase of Z. uniflorus or Z. communis of 

 "moist soil," the nomenclatorial history of the northern Lycopus 

 with thick white tubers should be stated as follows : 



Lycopus uniflorus, Michx. Fl. i. (1803) 14. L. pumilus, V^h\. 

 Enum, i. (1804) 211; Pursh, Fl. i. 16. Z. 77>-^/;//?//j-, authors, in 

 part, not L. Z. virginicus, (i pauciflorus, Benth. Lab. (1833) 185 



' Benth. 1. c. 



^" Forma procera, var. macrophyllus : Z. mucrophyllus, Renth." Gray, Proc. 



Am. Acad. viii. (1870) 285. 

 ^ "Forma depauperata : L. uniflorus, Michx. L. pumilus, Vahl." Oray. 1. c. 



