A(iHOSTlDE/E. 'AH 



cm. long, acute, sometimes 10-15 mm, wide, Pjuiielo 4-G-20 em. 

 long, niirrow. S|»ii\elets 4-.") mm. long, ovtite-lanceliite; empty 

 glumes oboval, tirst a little over :l mm, long, 1-nervetl, second about 

 [i mm, long with 3 obscure nerves; lloral glume oval, compressed- 

 keeled, scabrid on the back, the nuirgins and tip scarious; jialea 

 oblong, minutely scabrid, 



'J'he above ut)tes under the si)ecies were made after a study of 

 specimens collected by Lieut. A. W. (Jreely iu 188;:^ and 1883 in 

 Grinuell, 



2, A. arundinacea (Trin,). Vilt\( ariindinavea Trin. Unill. 

 loT (1824), SjmrobolHsannulinaceufi Vasey, Cat. Gr. U. S. (18S5). 

 Colpodium arundiiiaceinn Hook. Fl. lior. Am. 2:238 (1840). 



A stout perennial, 30-ltO cm, high, with cree])ing rootstocks; 

 culms simple. Sheaths about half as long as the internodes; ligule 

 lacerate, 3-4-7 mm. long; bla<les of sterile shoots few and short, 

 the middle and upper ones 25 cm. long, 1 cm. wide. Panicle ex- 

 serted, lanceolate, 20-30 cm. long; rays scabrous in half-whorls of 

 4-7, which are distant 4-5 cm. ; some of them only 2-3 cm. long 

 and flower-hearing for their whole length, the longest 10-12 cm., 

 interrupted and naked for a half to a third of their length. Spike- 

 lets on short pedicels, appressed, light green, often tinged with 

 purple; empty glumes thin, ovate-lanceolate, compressed, keeled, 

 1-3-nerved. first 3-4 mm. long, second 3-nerved, 4-5 mm. long; 

 floral glume scabrid, compressed, ovate-lanceolate, 5-nerved, the 

 lateral nerves obscure, 4.5 mm. long; palea elliptical, round on 

 the back, nerves obscure, 4 mm. long, 



Alaska, Harrington m 1871-2, L. M, Turner in 1884; Bering 

 Sea (Pribylov Islands), Dr. Mcrriam. 



Alaska and British America. 



G5. (134). CiNNA L. Sp. PI. 5 (1753). Ahula Adans. Fam. 2: 

 31 (17G3), liUittUi Fries, Novit, Fl, Suec, Maut, 2:2 (1831»), 



Spikelots 1-flowered, compressed in an open spreading panicle, 

 rachilla articulate above the outer glumes and often produced be- 

 yond the floret in a small pedicel, Km})ty glumes persistent, 

 lanceolate, acute, with a hispid keel, first 1 -nerved, second 1-3- 

 nervcd; floral glume usually stipitate above the empty glumes and 



