450 GR AMI \ K.i:. [HiioMUs. 



to 1,200 ft. in Yorkshire ; fl. June-July. Annual or perennial. Root fibrous. 

 f^tem 2-6 ft., smooth. Leaven -k in. diam., green, long, hairs scatter.-'!, 

 rettexed on the sheath ; ligule short. Panicle 3-5 in., lower branches 

 2-3-nate, long, lax, capillary, and rachis scabrid. Spilcelrti 1 in., narrow, 

 glaucous green, axis scabrid ; empty glumes acuminate, hairy or glabrous ; 

 ft. glumes with the awn |-f in., diverging in flower, then erect, more or less 

 hairy, lateral nerves strong, tip 2-toothed ; awn variable in length. Dis- 

 TRIB. Europe, Siberia ; introd. in N. America. 



2. B. erec'tus, Huds. ; leaves involute hairy, panicle erect narrow, 

 fl. glumes villous twice as long as the awn. 



Fields and waste places in dry soil, from Fife and Kirkcudbright southwards 

 to Kent and Sussex ; S. and Mid. Ireland, rare ; fl. June-July. Perennial. 

 Rootftoct stout, creeping ; stolons 0. Stems 1-3 ft., rigid, smooth, bent 

 below, then erect. Leaves narrow, rigid, almost subulate, hniry ; hairs 

 scattered on the upper sheaths, erect; ligule short. Panicle 4-6 in., 

 subsimple, strict, branches 2-3-nate and rachis scabrid. Spikelets f-l^j in., 

 subsolitary, green or purplish ; empty glumes longer than in B. as per ; 

 fl. glumes much the same in both. DlSTBlB. Europe, N. Africa. 



** Annual. Keels of palea pectinate-ciliate. Fl. glumes erect both in ftoicer 

 and fruit (except B. maximus). 



3. B. ster'ilis, L. ; leaves flat pilose, sheaths compressed, panicle very 

 lax, branches few very long in 4-whorls, spikelets subsolitary, fl. glumes 

 7-10 much shorter than their awns. 



Fields and waste places, from Banff and Elgin southwards; fl. June- July. 

 Root fibrous. Stem 1-2 ft., erect, smooth, leafy. Leaves -4 in. broad, 

 flaccid, ribbed ; sheaths glabrous or pubescent. Panicle 6-10 in. broad, 

 nodding, very lax and open ; branches horizontal and drooping. Spi-k: l< I* 

 with the awns 2 in., nodding, green ; empty glumes long, narrow, upper 

 twice the longest ; fl. glumes very narrow, gradually narrowed into the 

 very slender straight awn, strongly ribbed, margins hyaline. DISTKIB. 

 Europe, W. Siberia, N. Africa ; introd. in N. America. 



4. B. madriten'sis, L. ; leaves narrow flat hairy, sheaths terete, 

 panicle erect, branches few strict erect, fl. glumes 6-8 half as long as 

 the straight stout awn. 



Sandy waste places in Pembroke, Devon, Surrey, Kent, and Hants ; Channel 

 Is.; Tipperary in Ireland; a doubtful native, Watson; fl. June-July. 

 Stems 6-14 in., strict from an ascending base, smooth, leafy. Leaves 

 A-J in-, more or less hairy or tomentose ; hairs on sheaths reflexed ; ligule 

 short, truncate. Panicle 2-4 in., gblong, compressed ; branches appresscd, 

 short, and slender rachis scabrid. Spikelets J-f in. excluding the awns, 

 dull green, axis smooth ; lower empty glume subulate, half as long as tho 

 narrow linear upper ; fl. glumes ^ in., very narrow, scabrid, margins and 

 2-fid tip broadly hyaline ; awn slender; stamens usually 2. DISTHIB. 

 Europe from France and Spain to Turkey, N. Africa. 



VAR. 1, diaridrus,C\irt. (sp.) ; rachis and pedicels scabrous. VAR. 2, ritfidus, 

 Roth ; rachis, pedicels, and glumes pubescent. Channel Is. 



5. B. max'imus, Desf. ; leaves flat hairy, sheaths terete, panicle 

 erect, branches few strict, fl. glumes 4-6 not J as long as the long 

 straight awn. 



