HITCHCOCK AND CHASE — NORTH AMERICAN GRASSES. 77 



EXCLUDED SPECIES. 



The following names at some time included in Cenchrus comprise 

 only those based on American material or those of species which 

 occur in America: 



Cenchrus aegyptius (L.) Beauv. =Dactyloctenium aegyptium (L.) Richt. 



Cenchrus granulans Lt.=Rytilise granulans (L.) Skeels. 



Cenchrus hilarii Raspail= Hilaria cenchroides H. B. K. 



Cenchrus inflexus Poir. =Echinolaena inflexa (Poii\) Chase. 



Cenchrus laevigatus Trin.= Ant Jiephor a hermaphrodita (L.) Kuntze. 



Cenchrus marginalis Rudge= Echinolaena inflexa (Poir.) Chase. 



Cenchrus multiflorus Presl= Pennisetum sp. 



Cenchrus mutilatus (Hack.) Kuntze= Pennisetum mutilatum Hack. 



Cenchrus nervosus (Nees) Kuntze= Pennisetum nervosum (Nees) Trin. 



Cenchrus parviflorus Poir. is an unknown species, probably Chaetochloa 

 geniculata (Lam.) Millsp. & Chase. 



Cenchrus racemosus 'L. z =Nazia racemosa (L.) Kuntze. 



Cenchrus setosus Swartz=Pennisetum setosum (Swartz) L. Rich. 



Cenchrus spicatus (L.) Kuntze= Pennisetum glaucum (L.) R. Br. 



Cenchrus tripsacoides C&v.=Anthephora hermaphrodita (L). Kuntze. 



Cenchrus tristachyus (H. B. K.) K\mtze=Pennisetum tristachyum (H. B. K.) 

 Spreng. 



Cenchrus villosus S\)reng.=Anthe2)hora hermaphrodita (L.) Kuntze. 



Cenchrus villosus (R. Br.) Kuntze= Pennisetum villosum R. Br. 



