478 GR AMINES. [Agrostis. 



Europe (Arctic), N. Africa, N. Asia, N. America. — A. stolonifera, L. (/? 

 subre'pens, Bab.), is a more stoloniferous state. 



13. POLYPO'GON, Desf. Beaiid-Grass. 



SpiJcelets in a contracted or spikelike panicle, jointed on the pedicel, 

 1-fld. Empty glumes 2, much exceeding the flowering, equal, concave, 

 keeled, 2-fid or notched, sinus awned. Fl. glume sessile, hyaline, base 

 naked, broad, truncate, toothed, awned near the top. Palea small 2- 

 nerved. Scales 2, falcate, entire. Stamens 1-3 ; anthers small. Ovary 

 glabrous ; styles short, free, stigmas feathery. Fruit terete, wrapped in 

 the hyaline glumes and palea. — Distrib. Warm regions ; species 10. — 

 Etym. tto\vs and ircajav, from the many awiis. 



1. P. monspelien'sis, Desf. ; annual, awns much exceeding the sca- 

 brid deeply-notched glumes, fl. glume not awned. 



Damp pastures on the S.E. coast, rare; from Norfolk, Essex, Kent, to Hants; 

 Channel Islands; introd. elsewhere; fl. June-July. — Stems §-4 ft., erect, 

 stout, smooth. Leaves large, broad, flat, scabrid ; sheaths smooth ; ligule 

 large, obtuse. Panicle 1-6 iu., oblong-ovoid or fusiform, cylindrie or lobed, 

 obtuse, pale greenish-yellow, dense, soft. Empty glumes nearly ^ in., 

 narrow linear; awn straight, 2-3 times as long ; fl. glume not J as long as 

 the empty, silvery. — Distrib. From Holland southd., N. Africa, W. Asia, 

 India. 



2. P. littora'lis, Sm. ; perennial, awns as long as the nearly smooth 

 acute obscurely notched glumes, fl. glume awued. 



Muddy salt marshes, very rare; Norfolk, Essex, Kent, Hants; fl. July. — 

 Perennial, variable in size. Stems 1-6 ft., erect or decumbent, usually more 

 slender below thau in P. monspelien'sis ; panicle . smaller, more lobed, 

 purplish ; empty glumes much smoother, more acute, awns shorter, keel 

 scabrid ; fl. glume about § shorter than the empty ; awn exserted.— Distrib. 

 W. Europe.— Supposed by Duval-Jouve to be a hybrid between monspelitn'sis 

 and Agrostis al'ba. 



14-. CALAMAGROS'TIS, Adans. 



Tall, perennial grasses. Rootstock stoloniferous. SpiJcelets in a close 

 or spreading subsecund panicle, 1-fld., branches whorl ed. Empty glumes 

 much exceeding the flowering, subequal, concave, acuminate, upper 3-nerved. 

 Fl. glume enveloped in silky hairs, hyaline, 3-5-nerved, truncate, 2-fid, 

 toothed, awned at the tip or back. Palea small, 2-nerved. Scales entire. 

 Stamens 3. Ovary glabrous ; styles short, stigmas feathery. Frttit terete, 

 grooved in front, enveloped in the fl. glume and palea. — Distrib. N. 

 temp, regions ; species 5. — Etym. /caAa/xos and aypoo-ns, reed-grass. 



1. C. Epige'j os, Roth; panicle open, empty glumes subulate-lanceo- 

 late and hairs twice as long as the flowering, awn dorsal inserted above tho 

 middle of the fl. glume. 



