2 



that of his work and there is seldom any doubt as to the plant 

 intended. It not infrequently happens, however, that more than 

 one species is included in a fold. When this occurs, it is usually 

 possible to determine the plant referred to, by careful examination of 

 the description. Unfortunately many of Muhlenberg's species are 

 not represented in his herbarium. There has long been a doubt as 

 to the identity of a number of Muhlenberg's species through a lack 

 of knowledge of his types, and it has not infrequently happened that 

 they have been wrongly referred or the names cited as synonyms 

 under species with which they are in no wise related. On this 

 account the matter here presented will be of interest from the fact 

 that it serves to clear up many points of synonymy. 



"151 Panicum pungens M. 97 Elliott, 358." This was published as Panicum 

 setaceiun Mnhl. Descr. 99. Panicum neurantJmm G-riseb., is the same. A 

 specimen in this sheet bears the label " P. uniflorum n. s. ? " 



" 153 Panicum glaucum M. 98 a" = Chcetochloa glauca (L.) Scribn. 



"153 Panicum glauco aff. aristis purpur. Mon. 99 a. b." This was published 

 by Muhlenberg, Descr. 101, without name, Schrader giving it the name 

 Setaria affi)iis in Roemer & Schultes Mantissa 2 : 276. 1834. One specimen 

 on this slieet, labelled Panicum polystachion, is ChivtocJdoa corrugata parvi- 

 flora (Poir. ) Scribn. & Merrill. Another specimen is Chcetochloa imberbis 

 (Poir.) Scribn. 



"154 Panicum lavigatum Elliott 353 M. 99 c " = Chcetochloa imberbis (Poir.) 

 Scribn. A very young form with undeveloped spikelets, exactly matched 

 by a specimen in Herb. U. S. Department of Agriculture, collected in the. 

 Dismal Swamp, Virginia, by G. McCarthy, 1883. 



"155 Panicum viride Mon. 100 " = CJmtochloa viridis (L.) Scribn. 



"156 Panicum verticillatum Mon. 98, h " = Chcetochloa verticillata (L.) Scribn. 



"157 Panicum italicum M. 101 a," = Chcetochloa italica (L.) Scribn. 



"158 Panicum germanicum M. 101, 6, Elliott m''= Chcetochloa italica german- 

 ica (Mill.) Scribn. 



"159 Panicum hirtellum Elliott 85, Mon. 100 h" = OpUsmenus hirtellusR. & S. 



"160 Panicum crus-galli M. 103 a." There are two forms in this cover— one 

 the common long-awned, long-branched form of Panicum crus-galli L. ; the 

 other, Panicum crus-galli muticum Vasey. 



"161 Panicum crus-galli var. humifusa M. 103, 6." There is nothing in this 

 cover. » 



"163 Panicum hispidum M. 103 b, Elliott 25 " = Panicum. walteri Pursh. 



"163 Panicum colonum v. serotinum M. 103 a"^=Panicum colonum L. 



"164 Panicum dimidiatum Walter, Ell. 478." This was published by Muhlen- 

 berg, Descr. 108, as Panicum ivalteri, and is P. cligitaroides Carpenter. 



" 165 Panicum molle ? Mon. 77 c " = Eriochloa mollis (Michx.) Kunth. 



" 166 Panicum latifolium Mon. 104 a." This cover contains both forms of Pan- 

 icum latifolium L. (P. porterianum Nash and P. pubifolium Nash) and also 

 a form of Panicum commutatum Schultes. 



" 167 Panicum scoparium M. 104 b, macrocarpon Ell. 481." In this cover is one 

 specimen of true Panicum scoparium Lam. (P, viscidum Ell.) and one speci- 

 men of Panicum pauciflorum Ell, 



