220 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Plants stoloniferous. 
Spikelets glabrous, distant................2.0...... 4. 8. distans. 
Spikelets with lines of dense silky pubescence. 
Sheaths and blades velvety-pubescent......... 3. S. velutina. 
Sheaths, except those of the stolons, glabrous 
or nearly so..................... weeeeee 3a. S. velutina glabella. 
1. Syntherisma badia (Scribn. & Merr.) Chase, Proc. Biol. Soc. Washington 19: 
191. 1906. 
Panicum badium Scribn, & Merr. U. S. Dept. Agr. Div. Agrost. Bull, 24:12. /. 8. 
1901. 
Type locality, ‘‘Sierra de San Felipe, State of Oaxaca,”’ the type specimen collected 
by Smith (no. 915). 
Rance: Southern Mexico. 
HERBARIUM SPECIMENS: 
Jauisco: Zapotlan, pine woods, Hitchcock 7243. 
Micuoacdn: Urudpan, prairie, Hitchcock 6983. 
Oaxaca: Sierra de San Felipe, Smith 915. 
2. Syntherisma leucocoma Nash, Bull. Torrey Club 25: 295. 1898. 
Type locality, “high pine land, Florida * * * Lake Ella, Lake Co.” 
Rance: Southeastern United States, Cuba, and Gulf region of Mexico. 
HERBARIUM SPECIMENS FROM Mexico: 
Veracruz: Jalapa, prairie, Hitchcock 6656; railway cut, Hitchcock 6678. Orizaba, 
open rocky hill, Hitchcock 6350, 
3. Syntherisma velutina (DC.) Chase, Proc. Biol. Soc. Washington 19: 191. 1906. 
Milium velutinum DC. Cat.-Hort. Monsp. 126. 1813. 
Type locality, ‘‘Mexico.”’ 
RanGE: Southern Mexico and Central America. 
HERBARIUM SPECIMENS FROM MEXIco: 
Micnoacdn: Urudpan, prairie, Hitchcock 6973, 6974. 
México: Toluca, weed in field on rocky hill, Hitchcock 6916; among agaves, 
Hitchcock 6918. Amecameca, fields, Purpus 1636, Federal District, Xochi- 
milco, along ditch, Hitchcock 5882. Base of Sierra de Ajusco, sandy fields, 
Pringle 6623. Eslava, Pringle 9565. 
PuEBLA: Cerro Guadalupe, dry hills, Nicolas 1909. 
8a. Syntherisma velutina glabella Chase, subsp. nov. 
Plants perennial, more strongly stoloniferous than in the species; culms and nodes 
glabrous; culm sheaths glabrous or nearly so, those of the young shoots arising from 
the stolons velvety-pubescent, much less so than in the species; inflorescence as in 
the species, the racemes 4 to 8, 6 to 15 cm. long, scattered on a common axis 2 to 5 
em. long; spikelets bluish purple, 3 mm. long; first glume minute, hyaline; second 
glume and sterile lemma with rows of dense, appressed silky hairs on the lateral inter- 
nerves; fruit lead color. 
Type in the U. S. National Herbarium, no. 691224, “erect from creeping, stolon- 
iferous base,’’ collected in prairie, 1,700 meters altitude, Urudpan, Michoacan, 
Mexico, September 16, 1910, by A. S. Hitchcock (no. 6989). 
RANGE: Southern Mexico. ; 
HERBARIUM SPECIMENS: 
Veracruz: Veracruz, sandy prairie, Hitchcock 6554. 
MicHoacdn: Urudpan, clay bank, Hitchcock 6977, 6989. Paétzcuaro, Holway $212. 
4. Syntherisma distans Chase, sp. nov. 
Plants perennial, stoloniferous, the compressed culms ascending from the nodes 
of a slender widely creeping stoloniferous base; flowering culms simple, very slender, 
