480 QEAM1NE&. [APERA. 



A. Spi'ca-ven'ti, Beauv ; panicle large pyramidal effuse or contracted, 



awn much exceeding the fl. glume. Agros'tis Anemagros'tis, Syme. 



Sandy, often inundated fields, S.E. England, from York to Kent and Hants ; 

 fl. June-July. Stems 1-3 ft., densely tufted, stout or slender, erect from a 

 decumbent base, smooth. Leaves flat, glabrous or hairy, scabrid beneath 

 and on the edges ; ligules short, torn. Panicle 3 in., sometimes 3 in. broad, 

 green or purple; branches many in a whorl, capillary, scabrid. Empty 

 glumes T V in., lanceolate, acuminate, membranous, closed in fruit, nearly 

 smooth, shining; fl. glume hairy, awn subterminal, 3 times its length, erect, 

 very slender; palea with 2 tufts of silky hairs at the base. DISTRIB. 

 Europe, 1ST. Africa, Siberia. 



A. SPI'CA-VEN'TI proper ; panicle large broad effuse, anthers linear. Agrostis, L. 



A. INTERRUP'TA, Beauv. ; panicle contracted interrupted, anthers oblong. E. 

 counties. Ayrostis, L. 



17. DEYEUX'IA, Clarion. 



Perennial grasses. Spikelets panicled, 1-fld. ; rachilla produced into a 

 hairy or penicillate tip, bearded below the fl. glume. Empty glumes sub- 

 equal, keeled. Fl. glume longer or shorter, 5-nerved, tip entire or 2-4- 

 toothed ; awn twisted, dorsal, or 0. Palea thin, 2-nerved. Scales ovate, 

 entire or lobed. Styles short, distinct, stigma plumose. Fruit often 

 oblique enclosed within the fl. glume and pale, free or subadherent. 

 DISTRIB. All temp, regions ; species 120. ETYM. N. De.yeux, an 

 eminent French chemist. 



D. neglec'ta, KuntTi ; panicle close, empty glumes oblong-lanceolate 

 slightly exceeding the flowering, awn from below the middle of the fl. 

 glume straight. Calamagros'tis lappon'ica, Hook., not Hartm. ; C. stric'ta, 

 Nutt. 



Bogs and marshes, very rare ; Delamere Forest ; (Forfar extinct):; Caithness ; 

 Ireland ; fl. June-July. Stems 1-3 ft., strict, slender, smooth, polished. 

 Leaves short, all flat or lower filiform with convolute margins, almost 

 smooth ; ligule short. Panicle 2-6 in., narrow, erect, pale purplish and 

 green. Empty glumes T \)-^ in., acute, nearly smooth. DISTRIB. Scandi- 

 navia (Arctic"), Dahuria, N. America. Leaves in cultivated (Irish) specimens 

 quite flat. 



D. neglec'ta proper ; upper ligule obtuse, lower empty glumes acuminate, 

 upper acute twice as long as the hairs. (Forfar extinct), Cheshire. VAR. 

 Hooke'ri, Syme ; upper ligule acute, lower empty glumes acute, upper 

 broader one third longer than the hairs. Lough Neagh. 



18. AMMOPH ILA, Host. MARRAM-GRASS. 



Spikelets large in a contracted panicle, much laterally compressed, 1-fld. ; 

 rachilla produced beyond the fl. glume. Empty glumes 2, scarcely exceeding 

 the flowering, rigid, subequal, long, narrow, keeled, subacute. Fl. glume 

 rigid, with an oblique callus and a short pencil of silky hairs at the base, 

 5-nerved ; awn minute, subterminal. Palea equalling the glume, rigid, 2- 

 nerved. Scales very acuminate. Stamens, ovary, and fruit of Calamagros'tis. 



