20 



21. SITANION LANCEOLATUM J. G. Smith, sp. iiov. 



Culms 2..") to 5 dm. high, erect or ascendiug, ami somewhat geuicalate at the lower 

 nodes. Culms terete, smooth aud ascending, striate above. Nodes glabrous. 

 Sheaths glabrous, striate, closely euvelopiug tlie culms, longer than the inter- 

 nodes. Ligule almost obsolete. 15lades 8 to 15 cm. long, 2 to 3 mm. wide, rather 

 rigid, linear, erect, or the basal ones divergent, flat or convolute, glabrous on 

 the back, scabrous on the margins and nerves above. Spike erect, G to 10 cm. 

 long, barely exserted, or its base imludod in the uppermost leaf-sheath. Spike- 

 lets cylindrical, subcompressed, the florets closely overlapping one another. 

 Empty glumes 5 to 6 mm. long, keeled, lanceolate, 2-nerved, oblique, scarious 

 on the margins, entire or iine<|ually 2-awned, the longer awn scabrous, diver- 

 gent, 10 to 15 mm. long. Flowering glume 8 to 9 mm. long, glaucous, rounded 

 on the back, lanceolate, entire, or minutely 3-toothed at the apex, with a stout, 

 scabrous, divergent awn 2 to 4 cm. long. Palea as long as its glume, obtuse 

 or emarginate, scabrous on the margins above. Joints of the rachis, 5 to 7 

 mm. long, linear, spatulate, compressed, scabrous on the margins. 



Type collected by P. A. Eydberg, No. 3381, Barker, Mont., August 17, 1896. 



The habit of this grass resembles that o{ Af/rojnjron caninoide'i Beal; the spikelets 

 and empty glumes are arranged as in Elymus, 1)ut the nervation of the empty 

 glumes, trifid flowering glume, and the rachis dehiscent at the nodes, are suf- 

 ficient characters to throw this species into Siianion. 



22. SITANION HANSENI (Scribn.) J. G. Smith, nom. nov. Elymus hanseni 

 Scribn. U. S. Dept. Agr., Div. Agros., Bull. 11 : p. 56. 1898. 



"A rather stout, glabrous perennial, 9 to 12 dm. high, with narrow, spreading leaves 

 and slender fragile spikes 5 to 8 cm. long. Sheaths smooth, striate. Ligule 

 very short, hardly 1 mm. in length, entire. Leaf-blades 10 to 30 cm. long, 2 to 5 

 mm. wide. Internodes of the racliis about 1 cm. long. Spikelets 3- to 5-flow- 

 ered, about 1.5 cm. long, exclusive of the awns. Empty glumes lanceolate, 

 strongly nerved, tipped with 2, sometimes 3, unequal awns, the longer about 

 3.5 cm. First flowering glume 10 to 12 mm. long, entire or 2-toothed at the apex, 

 terminating in a straight or very slender awn about 5 cm. long. Palea about 

 the length of the glume, minutely scabrous on the sharp keels except at the 

 base, slightly pubescent at the truncate or 2-tootlied apex." 



Amador County, Cal. 



Related to S. anomalitm, but taller aud more slender, with mostly single rather 

 remote spikelets, which are longer. 



23. SITANION ANOMALUM J. G. Smith, sp. nov. (PI. IV). 



Culms erect or ascending, 5 to 6 dm. higli, terete, smooth. Nodes glabrous. Sheaths 

 smooth or the lower sparsely hirsute, ciliate along the maxgins, shorter than 

 the internodes. Ligule nuinbranous, 1 mm. long. Blades 4 to 12 cm. Jong, 3 to 

 4 mm. wide, involute, rigid, linear, long-attenuate, scabrous throughout. Inllo- 

 rescence simple or thyrsiform, 1 to 1.5 dm. long, few-llowered, interrupted 

 below, subllexuous. Siiikelets compressed, 4-flowered, the florcta distant. 

 Empty ghimes mostly lanceolate, entire, but those of the lowermost s^dkelets 

 bifid above the middle, with short, scabrous, divergent awns 1 to 4 cm. long. 

 Flowering glumes I cm. long, narrowly linear-lanceolate, rounded on the back, 

 smooth below, scabrous above the mid<lle, 3-aristate, lateral awns 1 to 2 mm. 

 long, the middle one straight, erect, scabrous, 3 to 4.5 cm. long. I'alea shorter 

 than the flowering glume, obtuse, erose, or bidentate, scabrous along the mar- 

 gins and on the nerves. Liternodes of the rachis 7 to 10 mm. long, aneiiiital, 

 scabrous on the margins. 



Typo cidhjcted by O. I). Allen, near I'asadena, Cal., May 12, 18S5. This grass is 

 internu'diate between true tSitaiiioti and true Elymus. The habit is that of 

 Tlhjmui^, but the articulate rachis, occasionally bifid empty glumes and trifid 

 flowering glumes, indicate a close relationship with Sitanion. 



DouHTFl'L Si'KciKs. Sitanion elymoidei Kaf. 



