BRACHYPODIUM. TRITICUM. 411 



[S. squarrosus (Parl.) ; pan. drooping simple, spikelets ovate- 

 lanceolate subcompressed, fl. nearly glabrous imbricated com- 

 pressed, awn divaricate, 1. pubescent. E. B. 1885. P. 128. 

 Somerset and Sussex, introduced. A. VI. VIL] 



Tribe XII. Hordeiea. 



45. BRACHYPODIUM Pal. de Beauv. 



1. B. sylvaticum (R. and S.); spike drooping, spikelets (at first) 

 terete alternate distichous, awns of the upper fl. longer than their 

 pales. 1. flat linear-lanceolate flaccid, root fibrous. E. B. 729. 

 P. 61. St. usually solitary or 2 or 3 from the same root, erect, 

 1 2 feet high. Sheaths hairy. Ligule short, blunt, notched 

 or torn. L. ciliate. Pales hairy. Woods and hedges. P. VII. 



E.I. 



2. B. pinnatum (Beauv.); spike erect, spikelets (at first) terete 

 alternate distichous, awns of the upper fl. shorter than their pales, 

 1. flat linear-lanceolate rigid, root creeping. E. B. 730. P. 1.32 

 137- St. several, erect, 1 2 feet high. Pales scabrous or hairy. 

 Sneaths subglabrous. Ligule short, truncate. L. not ciliate. 

 j3. ccespilosum ; 1. very narrow and involute, st. very many, 

 spikelets small smooth. On dry limestone soil. P. VII. 



46. TRITICUM Linn. Wheat-grass. 



1. T. caninum (Huds.); spikelets 2 5-flowered, 3 5-ribbed 

 gl. and 5-ribbed lower pale awned, axis and edges of the racbis 

 hispid, 1. flat rough on both sides, root fibrous. E. B. 1372. 

 P. 62. Agropyrum R. Spikelets approximate. a; spikelets 

 4 5-flowered, lower pale shorter than its awn. /3. alpinum ; 

 spikelets 2 4-flowered, lower pale much longer than its awn, 1. 

 nearly smooth. Banks. /3. Rocks on Ben Lawers. Mr. G. Don. 

 P. VII. 



2. T. repens (L.) ; spikelets 4 8-flowered, gl. acute 57- 

 ribbed, lower pale acute, axis scabrous, rachis with rough angles, 

 1. flat roughish a single row of hairs upon each ridge above, root 

 creeping. E. B. 909. P. 62. The lower pale often has an awn 

 which is seldom more than half its length. Rachis glabrous or 

 downy, but always with small ascending rigid bristles on its 

 angles. j3. littoreum ; rachis nearly or quite smooth, fl. awned, 

 edges of glaucous 1. involute. Common. /3. Sea-shores. P. 

 VII. Couch-grass. 



3. T. laxum^(Fr.) ; spikelets 5 8-flowered, gl. obtuse or api- 

 culate about 7-ribbed, lower pale blunt apiculate, axis downy, 

 rachis smooth or slightly rough at the angles not brittle, I. sca- 

 brous above with very many acute points flat involute when dry, 



T2 



