298 BOTANICAL GAZETTE [APRIL 
Bolafios, State of Jalisco, 2841 J. N. Rose, September 7, 1897.’’ Speci- 
men in National Herbarium. 
The preceding species, together with this and the following, form a 
rather closely connected series. The type of T. pilosum is distinguished 
by the strongly papillate-hirsute sheaths, and the blades pubescent upon 
both surfaces, but these characters are much less marked in some of the 
specimens which agree with the type in other particulars. 
I have referred here the following specimens: Jalisco, Rio Blanco, 
Palmer 508; Cafion near Guadalajara, Pringle 2623, and hills near Guada- 
lajara, Pringle 2611; San Luis Potosi, limestone ledges, Tinamel, Pringle 
3993; and San Jose Pass, Pringle 3447. 
TriesacuM Lremmoni Vasey, Contr. Nat. Herb. 3:6. 1892. Type 
locality, ‘‘Huachuca Mountains, Arizona (J. G. Lemmon).” Type 
specimen in National Herbarium. T. dactyloides Lemmoni (Vasey) Beal 
Grasses 2:19. 1896. 
Plant glabrous throughout except the lowermost sheaths, which are 
more or less hispid. The leaves are long and narrow, 5 to 10™™ -wide, 
and in herbarium specimens inrolled at the margins. 
In addition to the type specimen I have included two Mexican speci- 
mens, Jaral, Gebirgsthaler, Schumann 1718, and Jalisco, Mountains 
near Guadalajara, Pringle 2610. These two specimens have the spikes 
digitate instead of fascicled as in Arizona specimen, but the latter has 
the lateral spikes in ones or twos.—A.S. HirrcHcock, U. S. Dept. Agric., 
Washington, D. C. 
