19 



Wyoming: D. Griffiths, Nos. 493 and 500, Sundance, August 10, 1897; No. 576, Little 



Missouri Buttes, August 15, 1897; Xo. 669, Inyankara Mountain, August 23, 1897; 



A. Nelson, No. 1602, Laramie Peak, August 6, 1895. 

 Nevada : Shockley, without date or locality. 

 Arizona: Dr. Palmer, No. 534, 1876. G. C. Nealley, No. 171, Rincon Mountains, 



August, 1891. 

 Neiv Mexico: C. Wright, No. 2076, in part, 1851-52. E. O. Wooten, No. 322, White 



Mountains, August 12, 1897. 

 Texas: J. Reverchon, Upper Concho River fCurtiss, No. 3536). 



19. SIT ANION PUBIFLORUM J. G. Smith, sp. nov. 



Low, c-espitose perennial, with stout, rigid, erect culms, 2 to 3 dm. high, and tufted, 

 erect, rigid innovations, 1 to 1.5 dm. long. Culms terete, strigose-pubesceut above. 

 Culm leaves 3 to 5. Nodes glabrous, glaucous. Sheaths about as long as, or 

 longer than, the internodes, open at the throat, not at all inflated, glabrous. 

 Ligule obsolete. Blades puberulent on the back, rigid, linear-involute, pungently- 

 pointed, scabrous above, the lowest 10 cm., the uppermost 1.5 to 4 cm. long and 

 horizontally spreading or divaricate. Spike exserted, erect, about 5 cm. long. 

 Empty glumes setaceous, divaricate, 4 to 6 cm. long, scabrous throughout, not at 

 all lobed or divided. Spikelets 2|-flowered, the uppermost floret rudimentary. 

 Flowering glume of the lowest floret 7 mm. long, linear-lanceolate, acute, with 

 a rouuded callus, scabrous and finely pubescent, tipped with a straight, erect, 

 scabrous awn, 5 to 6 cm. long. Palea rounded or entire at the apex, as long as 

 the flowering glume, scabrous along the margins. Joints of the rachis one- 

 half to two-thirds as long as the lowest floret, dilated above, scabrous. 



Arizona, Neio Mexico, and southeastern Colorado : Type No. 795, J. W. Toumey, Tucson, 

 Ariz., 1892. Other specimens of this are No. 38, Toumey, south of Ashfork, Ariz., 

 June 25, 1892 ; C. R. Orcutt, No. 2.533, Congress, Ariz., April 21, 1896. A specimen 

 from the Moqui country without data. A. A. & E. G. Heller, No. 3558, Santa Fe, 

 N. Mex., May 21, 1897. C. S. Crandall, No. 535, Trinidad. Colo., May 13, 1892. 



This species is distinguished from S. Irevifolium by the rigid, convolute, erect, puberu- 

 lent leaves, densely tufted at the base of the low culms, erect spikes, and smaller 

 pubescent flowering glumes. 



§vN§vvElynioides. Empty glumes lanceolate, 2-5-nerved, entire or lobed, lotvest Jlorei 

 hermaplirodite; spikelets 1 or 2 at a node, when 1, the empty glumes inclosing the spike- 

 let as in Elymas and Agropyron: rachis of the spike articulate at the nodes. 



20. SITANION PLANIFOLIUM J. G. Smith, sp. nov. 



Culms stout, erect, 5 to 6 dm. high, the lower internodes smooth and shining, glau- 

 cous, terete, the uppermost slightly striate, glabrous. Sheaths striate, glaucous, 

 open at the throat, loose. Ligule obsolete. Blades 8 to 15 cm. long, 5 to 8 

 mm. wide, flat, lanceolate, becoming involute toward the acuminate apex, 

 scabrous above, and along the cartilaginous margins, glabrous on the back, 

 more strongly nerved below than above. Spike erect or somewhat nodding, 

 6 to 9 cm. long, purplish, long-exserted. Spikelets subcylindrical, com- 

 pressed. Empty glumes 6 to 7 mm. long, lanceolate, strongly 1- to 3-nerved, 

 entire or bifid, glaucous at the base, strongly scabrous on the nerves above, 

 tipped with a slender, spreading, scabrous awn, about 2 cm. long. Flowering 

 glume 10 to 11 mm. long, lanceolate, flat or rounded on the back, glaucous, 

 sparsely and minutely scabrous, bearing a stout, scabrous awn 3 to 4 cm. long. 

 Palea as long as, or slightly longer than, the flowering glume, glaucous, scabrous, 

 obtuse at the apex. Joints of the rachis linear, compressed, dilated above, 

 glaucous, 5 mm. long, very sharply 2-edged, scabrous on the margins. 



Type collected by W. N. Suksdorf, No. 224, high mountains, Skamania County, 

 Wash., August 10, 1896. 



Closely related to S. lanceolatum, from which it differs in the glaucous sheaths and 

 culms, flat, lanceolate leaves which are very smooth on the back, and the pur- 

 plish, long-exserted spikes with glaucous florets. 



