HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 



161 



PI. 480; Tampa, Hitchcock 927, 935; Myers, Hitchcock 906; without locality, 



Rugel 392. 

 Kentucky: Harlan County, Kearney 53. 

 Tennessee: Knoxville, Ruth 68; Nashville, Gattinger in 1880; Wolf Creek, 



Kearney in 1894; Cocke County, Kearney 970. 

 Alabama: Auburn, Earle & Baker in 1897; Tracy 3759; Tuskegee, Carver 55; 



Scottsboro, Chase 4506. 

 Mississippi: Meridian, Tracy 3267; Dekalb, Tracy 3255,3256; Fairport, Tracy 3211; 



Acona, Tracy 2058; Starkville, Tracy 1410, 1753; Enterprise, Tracy 3267, 3287; 



Jackson, Hitchcock 1310; Biloxi, Hitchcock 1073, Tracy 2032, 4574, 4588, 6358. 

 Arkansas: Fulton, Bush 1440; Texarkana, Bush 2488. 

 Louisiana: Calhoun, Ball 62, Hitchcock 1260; Coushatta, PaZZ 122; Shreveport, 



Coc£s 3511, Hitchcock 1239; Lake Charles, Hitchcock 110, 1124; Opelousas, 



Langlois 36; New Orleans, Drummond 456, 457. 

 Texas : Waller County, Hitchcock 1182, Thurow in 1898 and 1906; Dallas, Reverchon 



93, Sus/i 651; Houston, Pe&& 1236; Denison, Pc&6 1457; Columbia, £usft 1273; 



Heller 4085, 4209; Galveston, Pkn& 91; Palestine, Plank 51; Nealley in 1884. 

 Oklahoma: Wister, Hitchcock in 1903; Poteau, Hitchcock in 1903 (both in Hitch- 

 cock Herb.). 

 Mexico: Jalapa, Pringle 8083, C. L.Smith 1752; Hidalgo, Pringle 13250; Orizaba, 



Nelson 201; Chinantla, Liebmann 328; Valley of Cordoba, Bourgeau 2162; 



Galeotti 5733 (Brussels Herb.), Schiede & Deppe "acuminatum c;" xScZer 2160 



(both in Berlin Herb.). 

 Santo Domingo: Near Jarabaco, Eggers 2129. 



87a. Panicum xalapense strictirameum subsp. nov. 



DESCRIPTION. 



Differing from P. xalapense in having ovoid, more compact panicles with ascending 



branches, somewhat smaller spikelets, 1.7 mm. 

 long, shorter, narrower blades than common in 

 the species, and shorter culms. 



Autumnal form in smaller, shorter tufts. 

 Type U. S. National Herbarium no. 558449, col- 

 lected April 28, 1906, Jackson, Miss., by A. S. Hitch- 

 cock (no. 1311) . This specimen has short, appressed 

 blades, the uppermost 2.5 to 4 cm. long, and long- 

 exserted panicles 2 to* 3 cm. long. This form was 

 abundant on wooded hills in the outskirts of Jack- 

 son, where P. xalapense also grew, but from which it differed conspicuously in the 

 form of the panicle. Most of the other 

 specimens referred to this subspecies 

 are less characteristic, but are smaller, 

 with smaller blades than the species 

 usually has, though occasional speci- 

 mens of P. xalapense have the smaller 

 blades of the subspecies. 



DISTRIBUTION. 



Dry woods, South Carolina to Loui- 

 siana. 



South Carolina: Lancaster, 



House 2551. 

 Alabama: Auburn, Hitchcock 1333. 



Mississippi: Jackson, Hitchcock 1311; Madison, Tracy 1478. 

 Louisiana: Calhoun, Hitchcock 1290; West Feliciana, Cocks 3510. 

 41616°— vol 15—10 11 



Fig. 148.— P. xalapense strictirameum. 

 From type specimen. 



Fig. 149.— Distribution of P. xalapense strictirameum. 



