25 



Thlaspi, and the oldest generic name after 1753 is Bursa, 

 used by Wiggers in 1780. Capsella Med. appeared first 

 in 1792. Bursa must therefore be the generic name, and 

 bursa-pastoris the specific name. The amendment to the 

 Rochester rules made at Madison in striking out a part of 

 § III. was, in my opinion, not a wise one. The nomencla- 

 ture which results is often, to say the least, inelegant and 

 uncouth. Apios apios and Phragmites phragmites are in 

 plain English- comparable to "dog dog" or "cat cat." 

 Bursa bursa-pastoris translated is "Shepherd's purse 

 purse." 

 Lesquerella argentea (Pursh) MacM. Met. Minn. Vail. 263. 

 (1892) 

 Myagrum argenfeum Pursh PI. Am. 434. (1814) 

 Alyssum ludovicianum Nutt. Gen. II., 63. (1818) 

 Lesquerella ludoviciana Wats. Proc. Am. Acad. A. S. XXIII., 

 254. (1888) 

 CouUerina didymocarpa (Hook.) OK. Rev. Gen. I., 431. (189J) 

 Vesicaria didymocarpa Hook. PI. Bor. Am. I., 48. (1833) 

 Physaria didymocarpa Gray, Gen. I., 162. (1848) 



The name Physaria cannot be used as there is a genus Phys- 

 arium Persoon (1795) among the fungi which is far 

 older. 

 Boripa nasturtium (L. ) Rusby Mem. Torr. Bot. Club III., no 3) 

 5. (1893) 

 Sisymbrium nasturtium L. Spec. PI. II., 657. (1753) 

 Nasturtium officinale R. Br. Hort. Kew. Ed. 2, IV., 110. 

 (1812) 

 Roripa Scopoli was published in 1760; Nasturtium Robert 

 Brown in 1812. 

 Roripa palustris (L.) Greene Man. Bay Reg. Bot. 21. (1894) 

 Sisymbrium palustre Jj. Spec. PI. 657. (1753) 

 Nasturtium palustre DO. Syst. IL, 191. (1821) 



