(■)(•)('.; Lc(lcl). I'l. All. I, |). 02; Tun/.m. C.jil. liairal. no. 12'.)7; 'liiiczan. I'"l. IJaical.- 

 Daluir. (18.")(i. I) p. :\:\. no. i:i20. Arciui siihspinihi C'.laiivill. Man. (1,S11) j). 17; Ledel). 

 l"'l. Hos.s. IV. p. 118. 



in alpine tracl.s of llie Allaian, in places grown with inos.scs and lichcn.s. l'"lowcring 

 at (he end oi .July. 



Distrihulion: luirojic, noilhern, central, and eastern .\sia, North America, Green- 

 land. 



Aveiia desertoriim J.e.ssing in Linnaea IX (1831) p. 208; I.edeh. V\. Ross. IV, p. 

 ll.'n Tiuczan. Fl. Haical.-Dahur. (1856, I) p. 85, no. 1321; l.>i.i.i. 'Ki. .\.ii. VII (1911) 

 ]). Kill). Ai'cnn srnipriviicus Bess. Enuni. PI. Volh. (1822) p. (1: Ledeb. Fl. Alt. I. p. 

 89; Turczan. Cat. Haical. no. 1291; Karel. el Kiril. Fnuni. I'l. I'l. .\h. no. 911. Aut-nn 

 Besseri Giles, in Ledeb. Fl. Ross. IV, p. 415. 



In dry grass-fields, and on the steppes aljoul the river .\bakan. Taken in full bloom 

 in the middle of June. 



Distribution: Soutli-eastern Europe, southern Siberia, northern Mongolia, central 

 Asia. 



Avena pubesccns Huds. Fl. Angl. ed. I (1762) p. 42: Ledeb. Fl. Ross. IV, p. 413; 

 Turczan. Fl. Baical.-Dahur. (1856, I) p. 34, no. 1321: i;i,i,i.i. <|..i. A.rr. VII (1914) p. 1617. 

 Avena pratensis L., Ledeb. Fl. Alt. I, p. 90; Karel. et Kiril. Enum. PI. Fl. Alt. no. 912. 



On islets in the river Abakan, in grass-grown places, and in the ITrjankai country, 

 at Ust Tara-kem. Some of the specimens collected belong to /'. a//^/na (i.vio. Fl. Helvet. 

 I (1828) p. 334. 



Besides, I have collected specimens distinguished from the typical form chiefly by 

 broader leaves, and having the spikclets larger and more numerous. This form is sepa- 

 rated by me as: 



f. latifolia nov. f. 



Luxiiria et foliis Idtis ab forma liipica differens. Folia us(iiic ad I'l nun. lata, in 

 extremis in parinim acumen suhilo contractu. Panicnia lata el multijlora. rami valde 

 scabri. Gluma longissima paleas logitudine aequan.'i vel longior. Paleae fere aequales. 



Culm to 1 m. high, vigoious, erect, or somewhat ascending at the base, round, fur- 

 rowed, and glabrous. Sheaths somewhat inflated, nearly as long as the internodes, 

 striped, densely covered with long, white, somewhat descending hairs, especially the 

 lower sheaths nearly quite downy and whitish. Ligules prominent, from 5 to 8 mm. long, 

 rounded, and frequently slightly tattered at the top. 



Leaves broad, to 14 mm. in breadtli, and to 30 cm. in length, flat, equally broad, 

 suddenly rounded and shortly pointed at the apex, densely hairy beneath, glabrous, 

 or only with scattered hairs above. Panicle 17 to 20 cm. long, spreading, of a greyish 

 green or palish yellow, often somewhat relaxed and unilateral, and exceedingly flowery. 

 Rachis erect, or sometimes slightly twisted, equally thick, in the lower part smooth, in 



127 



