GRAMINE.E. 25/- 



iiJ. faalaris. Glumes boat-sliaped. 

 TltlCK III. 



poll 



» Callus not manifest ; floret sessile within the glumes. 

 +- Spikelots of two kinds, in pairs or threes 

 13. ^gopogon. One spikelet in a cluster perfect, the others staminate or neuter. 

 _ _, -^ +- Spikelets alike and perfect. 



1' fr?w ^"o^"f-, Spikelets in small umbellate clusters. 



16. Sporobolus. Sp.kelets in usually open panicles. Seed free from pericarp (utricle) 



♦ * Callus present, the floret raised within the ghuues ou a short rounded or stalk-like base, 

 +- Glumes long-awned. 



17. Polypogon. Glumes nmch longer than the floret. 



+- 4- Glumes awnless (except in one AgrostLi). 



18. Agrostis Lower gl»'ne s,ig,.t,y ^ ,„,i ^^^ ,i^„ ^,^^ ^^.^ ^^^^^^^ ^^^ 



10 Gastridium ri^nill ft '" , -'"'."^times awned on the back, the uj.per often wanting. 

 9n" rfn,;. T ^•"">*'s with a shining ventncose base. Inflorescence .si^ike-like 



thet!ro;:af,rr'"'""- ^^'""^ ^l-tinctlystlpitate. Lower pallt .short awned below 



21. Muhlenbergia Glumes variable, sometimes minute. Lower palet awned from the apex 



J loret mostly bearded at base and early deciduous. ^ 



4- 4-^ Glumes longer than the floret, which has a more or less conspicuous tuft of hairs at base 



22. Vaseya. Awn terminal. No rudiment of a second flower. 



23. Calamagrostis. Awn from below the tip of palet. Ihidiment present and mostly bearded 



^^"'''deH ll.nn^^^r^^^''"^,- . ■''•'"V''"'^ ''''''^y l-flowercl. Floret with a sharp-pointed callu. 

 deciduous Lower palet mv.dving the upper and the grain, coriaceous and i Xrated iri 

 fru.t aiHl terminated by a (usually long) simple or triple^w,,: indurated m 



2^: SUprT^n ^mlihiXISlM £o;-r^'"^°"^- '''''''' ^'"^^'^^ '''''' '^^ ^^^^ ^-- 

 20. Aristida. Awn triple, continuous or (rarely) articulate.l with the palet 



'"''mpewl!:t or'rluibm^Ii'vi " '''""';' V • f ?-'-"— ^ («- "'• >-- of the np,,er florets 

 iSVi'doi digitair^^ ^^^ '""' '^"'^ ''"'"'•" "1'°'"^ J""'t>^"«« .hnchis; the spikes 



♦ Spikelets l-nowercd. 



"• ^'''Si..'';Jl?£l\Z';:;.,i"""™''' '"'='»">■• '" '«» "»» >■■»" »~ »•-' .3-con.„.a 



. • Spikelets 2-l1oweied or mere, o„e llolel porreel, will, l.o or ,„o.e i,„|.crr,,.t or nentrnl (lowers 



above it. 



^^- ^°"S!.°"^vnJ.^°"'"" ^'"''^ ^"''^^ ""^^ ^"'""'^^ "^ ■''I'"-'- ^'"l"^'''*^^'^ ""^^•^■■^ "^^«'' reduced to 



29. Cynodoii. Floret and rudiment awnless. Spikelets in digitate spikes. 



* * * Spikelets 3 -several-flowered with more than one perfect floret. 



30. Leptochloa. Spikes slender, racemed. 



^"^'si.il'elL ^^V7«I'"«I''E.E. Spikelets 1 - mnuy-noweied. perfect or staunnate, in a 



el min^'''''''\ i^\T' I"'"^' i^-^-} 'V'^' •'"*'"•'' »'• ^■'•■'^•'■t, ^vith the nerve; often 

 exLuiieut as .seta3. I'alets entire m- 2-toothcd, often awned. 



31. Pleuraphis. Spikelets in threes at each joint of the rhachis. subtended by a hairy tuft, 



the middle one perfect, the others staminate. 



Subtribe V. AVENACEJ^. Spik.dets panicled, O-scveral.nower.d, the ihi.chis, often bearded 

 prolonged into an iinpei feet rudiment. Glumes mostly apialling or exceeding the flowei^. 



