602 Rydberg Rocky Mountain flora 



/Graphephorum Shearii (Scrlbn.) Rydb. 



Trhctum argentetim Scribn. Bull. U. S. Div. Agrost. II : 49. 



1898. Not T. argcnteinn R. & S. 18 17. 

 Trisetiim Shtarii Sznhn. Circ. U. S. Div. Agrost. 30 : 8. 1901. 



Professor Scribner has merged Graphephorum into Trisetiim, I 

 think, though, that they should be retained as two distinct genera, 

 even if the former should be transferred to the tribe Aveneae. 



^DisticMis stricta (Tom) Rydb. 



Uniola stricta Torr. Ann. Lye. N. Y. I : 155, 1824. 

 Distichlis maritima stricta Thurber, Bot. Calif. 2: 306. 1880. 

 Disticlilis spicata stricta Scribn. Mem. Torrey Club 5 : 51. 1894. 



/ 



Eatonia robusta (Vasey) Rydb. 



Eatonia obtusata robusta Vasey; Beal, Grasses N. Am. 2: 493. 



1896. 



To the characters given in the original description should be 

 added : intermediate nerves of the second glume very strong, and 

 leaf-blades firm, much broader than the sheaths, and therefore 

 forming distinct auricles at the base. The nerves mentioned are 

 in this species almost as prominent as the lateral nerves. In E, 



I 



obtusata they are faint, while the lateral ones are very prominent. 



/ Eatonia intermedia Rydb. sp, nov. 



Culm 6-8 dm. high, 1.5-2.5 mm. thick, striate, shining; 

 sheaths 5-^5 c^* l^^'^gj striate, minutely scabrous ; ligules about 2 

 mm. long, truncate, erose and often cleft; blades 8-15 cm, long, 

 3-5 mm. wide, usually flat, broader than the sheaths and therefore 

 forming distinct auricles at the base ; inflorescence rather narrow 

 and dense, 8-15 cm. long, 1-3 cm. wide; spikelet. usually 2- 

 flowered ; first empty glume about 2 mm. long, subulate, scabrous 

 on the back ; second empty glume oblanceolate in side view, 

 rather firm, slightly scarious on the margin, with prominent sca- 

 brous nerves, obtusish, about as wide as the flowering glumes, a 

 iittle over 2 mm. long and 0.5 mm. wide ; flowering glume oblong- 

 lanceolate in side-view, rather firm, with faint nerves and minutely 

 scabrous ; palate narrowly linear, scarious. 



This species has been named both E. obtusata and E. pennsyl- 



vanica^ and is intermediate between the two. From the former it 



