MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 469 



viridis Beauv. Agrost. 51 [Man. R. M. 404] ; Ixophoriis viridis 

 Nash, Bull. Ton-. Bot. Club, 22: 423 [111. Fl. i : 126]. 

 In waste places and cultivated fields. 

 Montana: Great Falls, 1891, R. S. Williams. 



* Syntherisma humifusum (Pers.) ; S. h'nearc (Krock. ) Nash, Bull. 

 Torr. Bot. Club, 22: 420, 1895 [111. Fl. i: iii] ; not Panictim 

 lineare L., 1762; Digi'tan'a humifusa Pers. Syn. i: 85, 1805; 

 Syntherisma o-Jabrwn Schrad. Fl. Germ, i: 163, 1806; Pani- 

 cum glahrum Gaud. Agrost. l: 22 [Bot. Cal. 2: 258]. 

 Like S. sanguinalis (L.) Nash {Panicum sanguinale L.), but the 



spikelets smaller, 2 mm. long; second glume about as long and the 



first glume generally wanting. In cultivated ground and waste 



places: introduced. 



Montana: Great Falls, 1891, R. S. Willia^yis. 



On page 27, before Alopecurus occidentalis, insert: 



*Alopecurus Californicus Vasey, Bull. Torr. Bot. Club, 15: 13. 



Like A. grniculaiits, but with a thicker spike. 



Montana: Lower Sand Coulee, 1888, R. S. Williams, 820, in 

 part (the specimens were named by Dr. Vasey himself). 



On page 39, before Avena Americana, insert : 



*Avenafatua L. Sp. PI. So [Bot. Cal. 2: 295]. 



The Wild Oats is beginning to become a troublesome weed in 

 many places. It differs from the common Oats in its longer panicle 

 and densely hairy grain. 



Montana: Manhattan, iSg^, Rydderg; Shear; Bozeman, 1895 

 and 1896, Rxdherg. 



On page 45, before Poa compressa, insert : 

 *Dactylis glomerata L. Sp. PI. 71 [111. Fl. i: 200: Bot. Cal. 2: 



301]- 



The Orchard Grass, an introduced species, is found occasionally 

 around dwellings. The grass resembles somewhat a stout Poa, but 

 the glumes are not scarious-margined and the spikelets are clustered 

 in a contracted panicle. 



Montana: Great Falls, 1892, R. S. Williams. 



On page 64, second and third lines, instead of " Triscttmi caninum 

 Gmelini,^^ read " Triticum caninum Gmclini.'''' 



