618 POACE^. 



The plant seen for description came from Italy from the Her- 

 barium of I. Burk, and is now owned by F. L. Scribner. 



15. B. HORDEACEUS L. Sp. PI. 77 (1753). B. mollis L. Sp. PI. 

 Ed. 2:112 (1762). 



A tomentose or pubescent glaucous green erect or geniculate grass, 

 30-50 cm. liigli. Slieatbs about the length of the internodes; ligule 

 1 mm. long; blades flat, 4-5 in number, 8-15 cm. long, 4-6 mm. 

 wide. Panicleo void, erect or nodding, rays in fours or fives, few- 

 flowered, the longest 2-4 cm. long beside the spikelets, but most of 

 them less than 1 cm. long. Spikelets 6-10-flowered, oblong, acute, 

 slightly compressed, 1.5-2 cm. long. Joints of the rachilla 1 mm. 

 long; empty glumes ovate, acute, first 3-5-nerved, 6-8 mm. long, 

 second 7-9-nerved, 8-10 mm. long; floral glume oval-obovate, 5-7- 

 nerved, bifid, 6-8 mm. long, the awn from the sinus 6-8 mm. long; 

 palea pectinate-cilfate, reaching nearly to the sinus of its glume. 

 Grain linear, flat. Regarded by Bentham as only a variety or form 

 of B. arvensis L., but usually named as above. 



Pennsylvania, Canhy for Clark 1922; Michigan, Beal 140; Cal- 

 ifornia, Pringle. 



Introduced from Europe into meadows and lawns. 



16. B. ciliatus L. Sp. PL 76 (1753). B. Canadensis Michx. 

 Fl. Bor. Am. 1:65 (1803). B. picbescens Muhh Willd. Enum. 

 Hort. Berol. 120 (1809). 



An erect perennial, 60-90 or even 150 cm. high. Sheaths 

 longer than the internodes, smooth, scabrous, or hairy; ligule a firm 

 ring, 1 mm. or less in length ; blades 6-9 or rarely 14 in number, flat or 

 involute above when dry, tapering toward the base, smooth, scabrous 

 or somewhat hairy, 20-30 cm. long, 5-10-17 mm. wide. Panicle 

 open, oval or pjrramidal, slightly nodding, 16-25 cm. long, rays in 

 twos, threes, or fours, the longest 6-10 cm. long, branching near 

 the middle, each bearing 1-2 or few spikelets. Spikelets terete- 

 lanceolate when young, but when older flattened, oblong or oval- 

 cuneate, 7-12-flowered, longest joint of rachilla 1.5-2 mm. long, 

 with a few hairs at least on the convex side; first empty glume 

 compressed, linear-lanceolate, 5.5-7 mm. long, usually 1-nerved, 

 sometimes 3-nerved, both forms on the same panicle, second glume 



