14 CLASS III. ORDER IL 



zoides (cut grass) spikelets spreading. ^ — virgin- 

 ica, spikelets close-pressed — lenticularisf spikelets 

 imbricate, glumes ciliate. 



TnicHODiuM. Calyx 2-valved, valves nearly 

 equal, acute ; keel with small spines : corol 1-val- 

 ved, awnless, shorter than calyx : stigmas nearly 

 sessile, sub-hispid. Panicled. 4. \0-^laxiJlorum^ 

 (thin grass) culm erect, branched, slender. % . 



Phleum. Calyx indurated, 2-valved, sessilcj- 

 linear, truncate, bicuspidate : corol inclosed. 4. 10. 

 —/zrare-wse (timothy grass) spike long, cylindric.2/- 

 2d. Glumes 2 or o-Jioivered ; panicled. 

 AiRA. Calyx glossy, 2-val\ed, 2-flowered : co*' 

 rol 2-valved, awnless, or awned at the base. 4. 10' 

 ^—-cesfiitosa^ (hair grass) corol with a strait awn— - 

 Jlexuosa'i awned, geniculate— o<?»/w5a;a, awnless. 

 3d. Glumes 2-Jloivered or more ; close-sfiiked. 

 Elymus. General calyx involucre-like, 4-leav- 

 ed, 2-flowered ; partial calyx lateral, 2-valved, ag- 

 gregate-ternate, many-flowered. (In a spike.) 4. 

 10 — virginicus (lime-grass) involucre striate, long- 

 awned. 2/. 



Eleusine. Calyx awnless, many- flowered : in- 

 florescence an unilateral digitate spike : corol 2- 

 valved, awnless. 4. 10 — indica, (dog-tail grass) 

 spikelets about 6-flowered. 



LiMNETis, or Dactylis. Calyx 2-valved, one 

 •^'alve smaller: corol 2.valved, awnless, compress- 

 ed, carinate : style long. Panicles strait ; spikes 

 lateral-flowered, florets imbricate. 4. 10 — glomera' 

 ta^ (orchard grass) a panicle condensed into a 

 spike-form head. %. 



Secale. Calyx 2-valved, 2 or many-flowered, 



opposite, solitary: glumes linear-lanceolate, smooth 



or channelled both sides. 4. 10 — cereale^ (rye) 



glumes rough-ciliate. 



Triticum. Calyx 2-YalvecI; about 3-flowered, 



