470 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



On page 66, instead of Sitanion elymoides, insert the iollowing 

 four species : 

 Sitanion rigidum J. G. Smith, Bull. U. S. Dept. Agric. Div. Agrost. 



i8: 13. t 



A low alpine plant. The following specimen was collected on or 

 near the boundary of the Yellowstone Park. 



Yellowstone Park: 1893,,/. y. Rose, 2yi. 

 Sitanion strigosum J. G. Smith, Bull. U. S. Dept. Agric. Div. 



Agrost. 18 : 17. 



In valleys, at an altitude of about 1500 m. 



Montana: Sheep Creek, 1896, Rydberg, j2gS (type). 

 Sitanion lanceolatum J. G. Smith, Bull. U. S. Dept. Agric. Div. 



Agrost. 18 : 20. 



On dry mountain ridges, at an altitude of about 2500 m. 



Montana: Barker, 1896, Rydberg, jj8i (type). 

 Sitanion montanum J. G. Smith, Bull. U. S. Dept. Agric. Div. 



Agrost. 18 : 16. 



In valleys, at an altitude of about 2000 m. 



Montana: Indian Creek, 1883, Scn'bncr, 437; Spanish Basin, 

 1896, Rydberg, jogi (type) and j/jj; T. A. Williains, 2002. 



On page 70, before Scirpus Americanus, insert : 

 Scirpus caespitosus L. Sp. PI. 48 [111. Fl. i: 262: Man. R. M, 

 366]. 



t Soon after the part of this catalogue that contained the grasses was printed a 

 monograph of the Genus Siiam'on containing twentv-three species, was publislied by 

 Mr. J. G. Smith ; of these four are found within the range, and to none of them 

 belongs the name S/faiiion elymoides. As I ha\e not had the time nor the facilities 

 to reexamine in the new light the other specimens cited under that species in the 

 body of the text, I cite here only the specimens mentioned by Mr. Smith. I also 

 insert an abstract of his ke^' : 



Some of the empty glumes 2-nerved. bifid from about the middle, the lobes abruptly 

 divergent; ]o\vest floret of one or both spikelets sterile and like the empty 

 glumes, but inserted on the rachilla and falling away with it. 

 Sheaths and dorsal surface of leaves glabrous; glaucous; low alpine plants. 



6". rigidum. 

 Leaves dorsally pubescent or scabrous. 



Culm-leaves 1-2.5 c^'"- lo'"'»' flexuous ; flowering gluines scabrous. 



5'. strigosum. 

 Culm-leaves short, rigid, ascending, 5-10 cm. long; flowering glumes smooth 

 below, scabrous above. 6'. monfauum. 



Empty glumes lanceolate, 2-5-neryed, entire or lobed ; lowest floret hermaphrodite ; 

 leaves involute, more prominentlv nerved above than on the back, 2-3 mm. wide. 



6\ lanceolatum. 



