I 



S. A NEW VARIETY OF PAMCUM NASHIANUM. 



Panicum nashianum patulum Scribn. & Merrill var. nov. 



Culms much brancliecl, slender, often purplish, puberulent or short pubescent 

 throughout ; sheaths much shorter than the internodes, rather densely pubes- 

 cent, with short, spreading hairs, ciliate on the margin ; leaf blades densely 

 short-pubescent on both sides, papillate ciliate, with few long hairs on the 

 rather strongly cartilaginous margins. Rachis and branches densely puberu- 

 lent. Spikelets 2 to 3. 5 mm. long ; first glume thin, obtuse, about one-third as 

 long as the spikelet ; second and third glumes densely pubescent, with short, 

 spreading hairs. 



Type specimen: 1296 Robert Combs, Braidentown, Manatee County, Fla., Sep- 

 tember 3, 1898. 



General distribution : In fertile hammock and pine woods, Florida and Missis- 

 sippi, March to September. Other specimens referred to this species : Flor- 

 ida: Old Town, 858, 859 Combs, 1898; Grasmere, 1169 Combs, 1898; Lake 

 City, 132 (in part) Combs and Rolfs, 1898; Lake Alfred, T. Holm, 1893; 

 Jacksonville, 140 T. H. Kearney, 1895. il/missi^jji ; Biloxi, 4586, 4587 S. M. 

 Tracy, 1898. 



This variety is closely related to the species, intermediate forms occurring, and 

 approaches Panicum demwmm. Trin. nearer than any other North American 

 plant we have seen. From the former it is at once distinguished by its 

 pubescent culms, sheaths, and leaves, and larger densely pubescent spikelets. 

 From the latter it is distinguished by its much smaller one-nerved first 

 glume and densely pubescent first and second glumes. The spikelets of 

 Panicmii demissuvi are glabrous. 



4. NOMENCLATURE NOTES. 



PANICUM RAMISETUM Scribn. nom. nov. Panicum suhspicatum Vasey, 

 U. S. Dept. Agr. Div. Bot. Bui. 8:25, 1889, not Desvaux, Opuscules 84, 1831. 



AGROPYRON OCCIDENTALE Scribn. new comb. {Agropyron glaucum occi- 

 dentale Scribn. Trans. Kans. Acad. Sci. 9 : 119. 1885 ; A. spicatmn Scribn. & 

 Smith, U. S. Dept. Agr. Div., Agros. Bui. 17:298, ^c/. 594, 1899, not Festuca 

 spicata Pursh, Fl. Am. Sept. 1 : 83. 1814; Agropyron smithii Ryd. Mem. N. Y. 

 Bot. Gard. 1 : 60. 1900. ) Rydberg states that he examined the type of Festuca 

 spicata Pursh, in the herbarium of the Academy of Natural Sciences of 

 Philadelphia, and found that this form had been wrongly interpreted in 

 Bulletin No. 4 of this Division. He, therefore, applied the name Agropyron 

 smithii to this species, under the impression that Agropyron glaucum occi- 

 dentale Scribn. was a nomen nudum. A description of this variety was pub- 

 lished, however, in the Trans. Kan. Acad. Sci. 9: 119. 1885, and according 

 to the Rochester rules, the name occidentale will have to be retained for this 

 species. 



AGROPYRON OCCIDENTALE PALMERI Scribn. new comb. Agropyron 

 spicatmn 2Kthneri Scribn. & Smith, U. S. Dept. Agr., Div. Agros., Bui. 4:33. 

 1897; A smithii imlmeri Heller, Cat. N. Am. PI. ed. 2, 3. 1900. 



AGROPYRON OCCIDENTALE MOLLE Scribn. new comb. Agropyron spi- 

 catum molle Scribn. & Smith, 1. c. ; Agropyron molle Ryd., Mem. N. Y. Bot. 

 Gard. 1 : 64. 1900. 



ELYMUS BOREALIS Scribn. nom. nov. Elymus ciliatus Scribn., U. S. Dept. 

 Agr., Div. Agros., Bui. 11:57, jjZ. JG, 1898, not Muhl. Descr. 179. 1817. 

 Elymus ciliatus Muhl. is not listed in Index Kewensis. 



