250 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
51. Panicum nodatum Hitche. & Chase, Contr. U. S. Nat. Herb. 15: 293. f. 381. 
1910. 
Type locality, ‘‘Sarita, Texas.’ 
RanGE: Southern Texas and northern Mexico. 
52. Panicum viscidellum Scribn. U.S. Dept. Agr. Div. Agrost. Circ. 19: 2. 1900. 
Type locality, ‘‘Gravelly banks near Jalapa, Veracruz.”’ 
Rance: Veracruz to South America. 
53. Panicum joorii Vasey, U. 8S. Dept. Agr. Div. Bot. Bull. 8: 31. 1889. 
Type locality, ‘‘Louisiana,”’ 
RanGE: Middle Atlantic States to Veracruz. 
54. Panicum elbomaculatum Scribn. U. 8. Dept. Agr. Div. Agrost. Cire. 19: 2. 
1900. 
Type locality, ‘‘Dry rocky hills, Patzcuaro, State of Michoacan,’’ Mexico. 
RanGe: Southwestern Mexico. 
MISCELLANEOUS SPECIES. 
55. Panicum obtusum H. B. K. Nov. Gen. & Sp. 1: 98. 1816. 
Type locality, “In planitie montana regni Mexicani, prope Guanaxuato.”’ 
Rance: Southwestern United States to southern Mexico. 
56. Panicum zizanioides H. B. K. Nov. Gen. & Sp. 1: 100. 1816. 
Type locality, ‘‘In calidissimis regni Novagranatensis, in ripa fluminis Magdalenae, 
inter Borjorque et Los Praxarales de Sogamozo,’’ Colombia. 
Rance: Mexico, West Indies and south to Paraguay. 
36. ICHNANTHUS Beauv. Ess. Agrost. 56. pl. 12. f. I. 1812. 
KEY TO THE SPECIES. 
Stemserect; blades firm, 1 to 1.5 cm. wide; spikelets strongly ribbed. 1. I. lanceolatus. 
Stems creeping and rooting; blades thin; spikelets nerved but 
scarcely ribbed. 
Spikelets acuminate; blades ovate-lanceolate.................. 2. I. pallens. 
Spikelets obtuse; blades linear-lanceolate...................... 3. I. apiculatus. 
1. Ichnanthus lanceolatus Scribn. & Smith, U. 8. Dept. Agr. Div. Agrost. Bull. 
4: 36. pl. 5. 1897. 
Type locality, “Old fields about Izamal,’’ Yucatdn, the type specimen collected by 
Gaumer (no. 854). 
RanGE: Known only from the type collection. 
2. Ichnanthus pallens (Swartz) Munro in Benth. Fl. Hongk. 414. 1861. 
Panicum pallens Swartz, Prodr. Veg. Ind. Occ. 23. 1788. 
Type locality, ‘‘Jamaica.”’ 
RanGE: Tropics of the Western Hemisphere. 
HERBARIUM SPECIMENS FROM MEXxIco: 
San Luis Porosf: Las Canéas, rich woods in barranca, Pringle 3827. 
Veracruz: Jalapa, damp shady bank, Hitchcock 6649; shady spring, Hitchcock 
6675. Cérdoba, wet shady bank, Hitchcock 6454. Mirador, Liebmann 400. 
3. Ichnanthus apiculatus Scribn. U. 8. Dept. Agr. Div. Agrost. Circ. 80: 1. 1901. 
Type locality, ‘‘Near Jalapa, State of Veracruz,” the type specimen collected by 
Pringle (no. 9208). 
RanGeE: Southern Mexico to Panama. 
HERBARIUM SPECIMENS FROM MEXICO: 
Veracrvz: Jalapa, among shrubs at edge of woods, Hitchcock 6611; Pringle 9208, 
type (in Hitchcock Herb.). 
