Fic. 148.—P. ralapense strictirameum. 
From type specimen. 
HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 161 
Pl. 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. 
AtaBaMA: Auburn, Earle & Baker in 1897; Tracy 3759; Tuskegee, Carver 55; 
Scottsboro, Chase 4506, 
Mississirrt: 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, Ball 122; Shreveport, 
Cocks 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, Bush 651; Houston, Bebb 1236; Denison, Bebb 1457; Columbia, Bush 1273; 
Heiler 4085, 4209; Galveston, Plank 91; Palestine, Plank 51; Nealley in 1884. 
OxLaHoma: 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 Cérdoba, Bourgeau 2162; 
Galeotti 5733 (Brussels Herb.), Schiede & Deppe ‘“‘acuminatum c;” Seler 2160 
(both in Berlin Herb.). 
Santo Dominco: 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.8. National Herbarium no. 558449, col- 
lected April 28, 1906, Jackson, Miss., by A. S. Hitch- 
cock (no, 1311). This specimen hasshort, 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. zalapense 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. zalapense have the smaller 
blades of the subspecies. 
DISTRIBUTION. 
Dry woods, South Carolina to Loui- 
siana. 
SoutH CAROLINA: Lancaster, 
House 2551. 
ALABAMA: Auburn, Hitchcock 1333. 
Fig. 149.—Distribution of P. zalapense strictirameum. 
MississiePt: Jackson, Hitchcock 1311; Madison, Tracy 1478. 
Loursrana: Calhoun, //itchcock 1290; West Feliciana, Cocks 3510. 
41616°—vo1 15—10——l1]1 
