60 AMERICAN MIDLAND NATURALIST 
This beautiful plant grows in wet meadows and boggy ravines 
and was collected by the writer at Leeds, Benson County, August 
23, 1898, being seemingly the only representative of the genus 
Euthamea in central North Dakota. 
Leeds, North Dakota. 
THE TYPE OF THE GENUS PANICUM: 
. ' BY J. A. NIEUWLAND. 
Article 45, section 6 of the rules of the Vienna Congress makes 
provision for the segregation of the natural genera from older more 
or less composite ones. It has been shown by A. A. Eaton* that 
in case of the genera Serapias and Epipactis a blunder had been 
made so that the type of the original group was put in the seg- 
regate genus. The reasoning of Mr. Eaton is as follows: “The 
genus Serapias of Linnaeus is composite consisting of Cephalanthera, _ 
Epipactis (Adanson’em. R. Br., not Bohmer) and Serapzas as re- 
stricted by Swartz. The first two genera have been segregated, 
and the residue of the original genus now bears the name. It 
has been customary to leave the final residue of segregation the 
original name, but this is contrary to Article 45 of the Vienna 
Code provided the type or origin of the group is not contained 
aggregate consisting of species of Cephalanthera and Epipactis 
Adans., genera shown by Wettstein to be inseparable. This type is 
fixed by Linnaeus in Gen. Pl. Ed. 5, (1754.) as t. 245 of Tournefort 
which represents S. grandiflora. The name Serapias must then 
be restored to the Cephalanthera-Epipactis group.” 
The case of the Linnaean genus Panicum is quite similar. 
The type of the genus Panicum is not at present in what is called 
Panicum by the authors, but rather in the segregated Chaetochloa 
or Ixophorus or Setarva ete. (or whatever synonome is preferred.) 
The segregate has not fared well from the very start since wrongly 
made up by Beauvais, and has passed through all the throes of 
synonomy and homonymy. ‘The name Panicum should therefore, 
be given to this group that contains the undisputed type, Panicum — 
* Eaton, A. A. Proc. Biol. Soc. Washington, XXI, [1908] p. 63-68. 
also Fedde, F. Rep. Novar. Spec. [1908] VI. p 45. 
