666; Ledeb. Fl. Alt. I, p. 92; Turczan. Cat. Baical. no. 1297; Turczan. Fl. Baical.- 

 Dahur. (1856, I) p. 33, no. 1320. Avena subspicala Clairvill. Man. (1811) p. 17; Ledeb. 

 Fl. Ross. IV, p. 418. 



In alpine tracts of the Altaian, in places grown with mosses and lichens. Flowering 

 at the end of July. 



Distribution: Europe, northern, central, and eastern Asia, North America, Green- 

 land. 



Avena desertorum Lessing in Linnaea IX (1834) p. 208; Ledeb. Fl. Ross. IV, p. 

 415; Turczan. Fl. Baical.-Dahur. (1856, I) p. 35, no. 1324; KptM. $.i. A.it. VII (1914) 

 p. 1616. Avena sempervirens Bess. Enum. PL Volh. (1822) p. 6; Ledeb. Fl. Alt. I, p. 

 89; Turczan. Cat. Baical. no. 1294; Karel. et Kiril. Enum. PL Fl. Alt. no. 911. Auena 

 Besseri Gries. in Ledeb. FL Ross. IV, p. 415. 



In dry grass-fields, and on the steppes about the river Abakan. Taken in full bloom 

 in the middle of June. 



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

 Asia. 



Avena pubescens Huds. Fl. AngL ed. I (1762) p. 42; Ledeb. Fl. Ross. IV,. p. 413; 

 Turczan. Fl. Baical.-Dahur. (1856, I) p. 34, no. 1321; Kptiji. $jr. Ajt. VII (1914) p. 1617. 

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



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

 at Ust Tara-kem. Some of the specimens collected belong to /. alpina Gaud. Fl. Helvet. 

 I (1828) p. 334. 



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

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

 rated by me as: 



f. latifolia nov. f. 



Luxuria et foliis latis ab forma typica differens. Folia usque ad ik mm. lata, in 

 extremis in parvum acumen subito contractu. Panicula lata et multiflora, rami valde 

 scabri. Gluma longissima paleas logitudine aeqUans vel longior. Paleae fere aequales. 



Culm to 1 m. high, vigorous, 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 breadth, 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 



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