AUHOSTIDK.E. ^To 



Achufxhtn Jiink, Ilort. IWrol, 1:05 (If^^T). Plantinia lUibaiii. in 

 Ntiov. (iiorn. liot. Ital. 5:317 (isr;j). 



S|tikt'l('ts l-flowiTcd, Hat and tTowded into a cvlindrieal or ovoid 

 sjtiki'liki' jianic'le, racliilla very sliort. articulation above tlu; lower 

 glumes and sometimes extending bevond tlielloweras a sliort s))iiu\ 

 Outer glumes 'J. persistent, nearly e(|ual. membranous, com- 

 pressed-keeled. l-;}-nerved. subtniiu-ate, tlie keels projecting into a 

 point or very slutrt awn: Moral glume very tliin, shorter, broader, 

 truncate or denticulate, eiicbtsing a narrow liyalinepalea and a per- 

 fect llower; the ])alea sometimes containinga minute bristle on tlie 

 l)ackand near the base. Stamens ;5. Styles distinct. (Jrain ovoid, 

 enclosed by the delicate palea, but not a<llierent. 



Kre(!t annual or ])erennial grasses; bhides flat; s])ike l)(»rne on 

 a long peduncle, often pubi'scent. 



A snudl genus containing about U) species found in Kuroj)e, 

 Central ami Western vsia, Northern Africa, and the northern jiart 

 of Nortli America, lientham says: •' It has l)een proposed to se)»- 

 arate generically Chihiclihid Heauv. {Arhnodon Link) for the few 

 species in which the racliilla is produced beyond the flower into a 

 minute bristle; the character is, however, in this instance very 

 trifling and uncertain." 



1. P. alpinum L. Sp. I'l. r>!t (1T5:}). ^Moixtaix-timotht. 



An erect perennial, 30-riO (;m. high. Sheaths two-thirds as 

 long as the internodes; ligule short, truncate: blades smooth or 

 scabrid, .^)-8 cm. long. Spike ovoid or oblong, usually tinged with 

 ])urple, 1.5-:} cm. long. Spikelets oblong, 3—1 mm. long, teeth 

 lu'arly 1 mm. long, the keels strongly fringed with hairs, empty 

 glumes 3-ncrved: floret about 2 mm. long, floral glunu' .'■)-nerved. 



Plants from the White Mountains. N. II. ; Montana. Mt. Hood, 

 and Oregon have spikelets 3 mm. long, while some from Colorado 

 have spikelets 4 mm. long. 



Vermont. Ifosfonl for TJ. S. Dept. Agricul. 341 ; New 

 Ilampsliire, Clark 4304; Colorado, Camlihi; Montana, Anderson 

 '23. Utah, Jones 1201; Alaska, Fitnsfon for U. S. Nat. Herb. 

 110: British Columbia, Macottn; Oregon, lloiveU; Behring Sea, 

 Mcrriam. , 



