HITCHCOCK REVISIONS OF NORTH AMERICAN GRASSES. 169 



"Panicum glaberrimum. Hab. juxta littor. maritima," is a long-awned form 'without 

 base. 



Panicum glaucurn var. purpurascens Ell. Bot. S. C. & Ga. 1: 113. 1816. This is 

 stated by Merrill 1 to be a short-awned form of Chaetochloa imberbis [C. geniculatd]. 



Setaria imberbis Roem. & Schult. Syst. Veg. 2: 891. 1817. Based on Panicum 

 imberbe Poir. 



Pennisetum laevigatum Nutt. Gen. PI. 1 : 55. 1 818. Based on Panicum laevigatum Ell. 



Setaria laevigata Schult. Mant. 2: 275. 1824. Based on Panicum laevigatum Muhl. 



Setaria affinis Schult. Mant. 2: 276. 1824. Based on "Panicum n. 4. (sine nomine). 

 Muhlenb. Descr. uber. p. 101." "Habitat in Georgia et Pennsylvania." The type 

 is in the Muhlenberg Herbarium. 



Setaria berteroniana Schult. Mant. 2:276. 1824. The specimen was collected in 

 Santo Domingo by Bertero. Schultes describes it in a note under Setaria corrugata. 

 The type has not been examined but the description, "setis 9-12," together with the 

 locality, leaves no doubt as to the identity of the species. 



Panicum. flavum Nees, Agrost. Bras. 238. 1829. "Habitat in campis graminosis 

 provinciae Piauhiensis, turn in campis ad Joazeiro provinciae Pernambucensis et 

 Bahiensis." The Pernambuco specimen has been examined in the Munich Her- 

 barium. 



Panicum imberbe /3 pumilvlm Nees, Agrost. Bras. 240. 1829. Based on Panicum 

 pumilum Poir., which is uncertain, but the plant described by Nees appears to be 

 Chaetochloa geniculata. 



Panicum fuscescens Willd.; Nees, Agrost. Bras. 241. 1829, as synonym under P. 

 purpurascens. The type has been examined in the Willdenow Herbarium. 



Panicum dasyurum Nees, Agrost. Bras. 241. 1829. "Habitat in Brasilia. (Comes a 

 Hoffmannsegg) ( Vidi in Herb. Willd.) — Ad Monte Video legit Sellow (Vidi in Herb. 

 Reg. Berol.)." The first specimen has been examined in the Willdenow Herbarium. 

 A specimen of the Sellow collection is in the National Herbarium. 



Panicum penicillatum Willd.; Nees, Agrost. Bras. 242. 1829. Not Panicum penicil- 

 latum Nees, op. cit. 145. "In Brasilia, ad Rio de Janeiro (Raddi); in Monte Video 

 (Sellow.) (Vidi in Herb. Willd.)." The bristles are described as being 4 times as long 

 as the spikelete. A duplicate of the Sellow collection cited is in the National 

 Herbarium. The label reads "Panicum penicillatum W. herb. N. v. E. Bras." 



Panicum tejucense Nees, Agrost. Bras. 243. 1829. " Habitat in districtu Adamantum 

 prope Tejuco et aliis in locis provinciae Minarum generalium." The type has been 

 examined at the Munich Herbarium. 



Setaria fiava Kunth, Rev. Gram. 1: 46. 1829. Based on Panicum flavum Nees. 



Setaria ventenatii Kunth, Rev. Gram. 1 : 251. pi. 37. 1830. " Grescit in Portorico 

 et ? Hispaniola." Kunth gives as synonym Cenchrus parviflorus Poir., and states that 

 he has not seen the original specimen of this, but as Poire t says he saw the specimen in 

 the herbarium of Ventenat, " ou je n'ai trouve - parmi les Cenchrus qu'une seule plante 

 originaire de Portorico, qui-est mon Setaria ventenatii," it seems probable to him that 

 the two names refer to the same specimen. The nodes are described by Kunth as 

 pubescent, but in the plate they are glabrous. The bristles are described as long (5 

 times as long as the spikelets) and purple. The type specimen has been examined in 

 the Berlin Herbarium. It is a narrow-leaved form with several rather small panicles. 



Setaria tejucensis Kunth, ReV. Gram. 1 : Suppl. xi. 1830. Based on Panicum 

 tejucense Nees. 



Setaria penicillata Tiesl , Rel. Haenk. 1: 314. 1830. Based on Panicum penicillatum 

 Willd. 



Panicum ventenatii Steud. Nom. Bot. ed. 2. 2: 265. 1841. Based on Setaria vente- 

 natii Kunth. 



1 U. S. Dept. Agr. Div. Agrost. Circ. 29: 3. 1901. 



