152 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. " 



Andropogon ambiguum Michx. 



"In sabulosis Carol." The specimen is Gymnopogon ambiguus (Michx.) B. S. P. 

 Branches floriferous from base. 



Chloris petraea Sw. 



" Carolinis & Florida." The specimen belongs to this species. 



Chloris monostachya Michx. 



There is no plant with this name, but there is a good specimen which answers to the 

 description labeled Chloris piperita, without locality, however. The published 

 locality is, "in sylvis Carolinae inferioris." Michaux states that the fresh plant has a 

 peppery taste. The specimen is Caiupulosus aromaticus (Walt.) Scribn. 



Chloris mucronata Michx. 



"In eultis Carolinae." The specimen is Dactyloctenium aegyptium (L.) Willd. 



Chloris curtipendula Michx. 



"Hauteurs du Missouri et Poste Vincenne." The specimen is Bouteloua curti- 

 pendula (Michx.) Torr. as usually understood. 



Trips acum dactyloides L. 



"Illinois, Basse Carolina." The specimen is of this species. 



Tripsacum cylindricum Michx. 



"In florida." The specimen is Manisuris cylindrica (Michx.) Kuntze (Rottboellia 

 cylindrica (Michx.) Chapm. of our manuals). 



Rottboellia dimidiata L. 



Nil locality is given. The specimen is Stenotaphrum sccundatum (Walt.) Kuntze. 



Cenchrus tribuloides L. 



No locality is given on the sheet but the specimen must have been collected along 

 the seashore, for it has the? large villous fruits characteristic of the true C. tribuloides 

 L., which has been named ('. maerocephalus (Doell) Scribn. and C. vaginatus Steud. 

 The common inland form which has been going under the name of C. tribuloides 

 should be called ('. car olinianus Walt. 



Aira flexuosa L. 



"Connecticut." The specimen is I) cschampsia flexuosa (L.) Trin. 



Aira ambigua Michx. 



"Biv. que tombent an Lac St. Jean." The specimen is Deschavipsia caespitosa 

 (L.) Beauv. 



Aira melicoides Michx. 



"Canada." The specimen is Graphephorum mrlicoideum (Michx.) Beauv. as 

 described in Britton's Manual. 



Aira obtusata Michx. 



"In sabulosis Carolinae, Georgiae, Floridae [sign for perennial]. In Florida juxta 

 donium Wiggin." The specimen is Sphenopholis obtusata (Michx.) Scribn. (Eatonia 

 obtusata (Michx.) Gray as described in our manuals). 



There are two individuals. One is slender, about a foot high, nearly glabrous 

 throughout, with a narrow rather compact panicle; the other, more robust, but con- 

 sisting only of panicle and upper leaf, is pubescent (under a lens) upon sheath and 

 blade. This panicle, which is attached to a label with "herb, de M. de Pinckney 

 11.2," is lobed like the western form called S. obtusata lobata (Trin.) Scribn. The 

 first specimen should be taken as the type, as it no doubt represents Michaux's own 

 collection from Florida. 



Professor Scribner has pointed out° that Eatonia of Rafinesque could not be the 

 Eatonia of Endlicher and later authors, but he was not able to identify Eatonia Raf. 



a Rhodora 8: 137. 1906. 



