CLASS III. ORDER II. IS 



alternate ; florets obtusish and pointed : gjlumes 

 beardless or interruptedly bearded : spikelets 

 shortish, 4. 10 — hybernum, (winter wheat) nearly 

 awnless. % — aestivum^ (summer wheat) long-awn- 

 ed. ©. 



LoLiuM. Calyx 1-leafed, permanent, many-flow- 

 ered : florets in a 2-rowed simple spike. 4. 10— 

 fierenne^ (darnel-grass) spike awnless, 1|. — temw 

 ientum, spike awned. ^. 



Atheropogon. Calyx 1-valved, 2-flowered : 

 corol 2-valved, awned. 4. 10 — afiludoides (hairy 

 beard-grass) leaves very narrow. 1^. 



4th. Glumes many-Jio'ivered ; in panicles, 



Uniola. Spikelets flat, 2- edged, ovate : calyx 

 many-glumed : eorol 2-valved, awnless, inner one 

 smallest : stamens 1 to 3 : appendages 2, some- 

 what 2- horned. 4. 10 — sfiicata (sea rush-grass) 

 panicle spike-form, pointing one way. % — latifolia, 

 panicle lax. Ijl. Monandrous. 



Briza. Calyx 2-valved, many-flowered : spike- 

 lets of the panicle 2.ranked : valvelets inflated 

 heart-form, obtuse ; inner one minute. 4. lO — cu' 

 nadensis (quake-grass) culm erect, panicle lax. 



Sorghum. Polygamous. Florets in pairs ; one 

 perfect and sessile, the other staminate or neutral 

 and pedicilled. 4. 10 — saccharatum^ (broom-corn) 

 panicle somewhat whorled, spreading : seed oval. 



©• 



PoA. Calyx 2-valved, many-flowered : corol 

 ovate ; valves 2-coloured, acutish, scarious at their 

 margins: spikelets of the panicle ovate, awnless. 

 4. 10 — firatensis^ (meadow-grass) panicle diff"used, 

 spikelets 4-flowered. % — trivialis^ panicle diff'used, 

 spikelets 3-flowered. X — comfiressa^ (blue-grass) 

 culm compressed, panicle pointing one way. 11 — 

 retitans^QXxXm. creeping, spikelets 6 to 10-fiowered. 



