52 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Alabama: Mobile, Mohr in 1878; Deatsville, Pollard & Maxon 307. 

 Mississippi: Starkville, Kearney 9, 18; Nicholson, Kearney 372 in part; Biloxi, 



Tracy 4618, 6507; Mississippi City, Tracy 77. 

 Louisiana: Calhoun, Ball 67; McCall, Combs 1436; Burnside, Combs 1419; 



Coushatta, Ball 135; Natchitoches, Ball 139, 164; Rayville, Ball 31, 24; 



Oberlin, Ball 215, 229; South Pass, Tracy & Lloyd All', Baton Rouge, Joor 



25; Lake Charles, Chase 4392; without locality, Langlois 29. 

 Texas: Houston, Ha 11 817; Waller County, Thurow in 1898 and 1903 ; Texarkana, 



Heller 4210, 4246; Clarksville, Plank 8; Llano, Plank 18 in part; Kerrville, 



Heller 1883 in part; Santa Maria, Nealley in 1889; without locality, Joor, 



Nealley in 1886. 

 Oklahoma: False Washita, Palmer 375 in 1868. 

 New Mexico: Las Cruces, Plank 29. 

 California: Fresno, Bioletti 140. 



Mexico: Head of Mazatlan River, Wright 1317 (Gray Herb.). 

 Bermudas: Hamilton, Millspaugh PI. Utow. 126. 

 Bahamas: Hog Island, Eggers 4405, 4512; Nassau, Curtiss 177; Cat Cay, Brace 



3742; Watlings, Geogr. Soc. Baltimore 489. 

 Cuba: Herradura, Tracy 9055, 9342; Santiago de las Vegas, Hitchcock 151; Bata- 



bano, Hitchcock 150; Guanabacoa, Leon 919; without locality, Wright 3456, 



3860 in part, 3861. 

 Porto Rico: Utuado, Britton & Cowell 432. 

 Leeward Islands: Guadeloupe, Duss 3178. 

 Brazil: Bahia, Salzmann; without locality, Riedel 959. 

 Paraguay: Morong 543, 1002 in part. 

 Uruguay: Montevideo, Arechavaleta. 



18. Panicum bartowense Scribn. & Merr. 



Panicum bartowense Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Circ. 35: 3. 

 1901. "Type specimen collected in wet, reclaimed swamps at Bartow, Polk County, 



Fla. No. 1220, Robert Combs, September 29, 1898." 

 The type, in the National Herbarium, is an erect, sim- 

 ple plant about 1.75 meters high, with conspicuously 

 |\\ hispid sheaths and nearly glabrous blades, the spikelets 

 about 2.5 mm. long. 



DESCRIPTION. 



Plants simple or sparingly branching, as much as 2 

 meters high, erect; culms glabrous, the larger as much 

 as 7 mm. thick; sheaths mostly longer than the inter- 

 nodes, papillose-hispid; ligules 2 to 3 mm. long, the 

 cilise more or less segregated in tufts; blades 15 to 40 cm. 

 long, 5 to 13 mm. wide, glabrous or more or less pilose above, rarely sparsely hispid 

 beneath, rather prominently papillose on the margin near the round but scarcely 

 cordate base; panicles large and finally loosely spreading, 15 to 60 cm. long, the 

 branches at first ascending, finally spreading, the short branchlets and short-pediceled 

 spikelets appressed as in P. dichotomiflorum; spikelets 2.2 to 2.7 mm. long, the glumes 

 and fruit as in P. dichotomiflorum. 



This species is closely allied to P. dichotomiflorum, and may be only an extreme 

 form of that species. As limited here, it differs in having tall, erect, simple, or 

 nearly simple culms and papillose-hispid sheaths. The blades are usually pilose 

 above, though the type specimen has nearly glabrous blades, but this is the case 



Fig. 33. — P. bartowense. From 

 type specimen. 



