

62 





DIGYNIA. 





AI'RA. Florets, all hermaphrodite, without the rudiment 



of a third, CaL 2 valves* 



[Holcus mollis.] 



ME'LICA. % Florets all hermaphrodite, CaL 2 valves. 



Nectary of 1 leaf, fleshy. 



SESLE'RIA. Involucr. 2 leaves : CaL 2 valves with 1 to 



3 florets : Bloss. toothed at the end. 



[A vena elatior, 

 glomerata.l 



Cynosurus. Dactylis 





(3) Grasses. Flowers scattered, several In each calyx. 



BRI'ZA. CaL 2 valves : Bloss. heart-shaped, valves blunt, 



bellying. 



PO'A. CaL 2 valves: Bloss. egg-shaped, valves sharpish. 



FESTU'CA. CaL 2 valves : Bloss. oblong; valves sharp- 

 pointed . 



BRO'MUS. CaL 2 valves: Bloss. oblong; outer valve 



with an awn fixed below the point. 



AVE'NA. CaL 2 valves: Bloss. oblong; valve's with a 



jointed awn upon the back. 



AftUN'DO CaL 2 valves : Bloss. awnless, woolly at the 



base. 



[Dactylis glomerata. Melica cserulea, Aira mjuatica.] 



(4) Grasses. Flowers forming a spike, on a long and 



slender receptacle. 



TRI'TICUM. CaL containing many florets. 



HOR'DEUM. Involucrum of 6 leaves, containing 3 florets : 



Flowers simple. 



ROTTBO'LLIA. CaL egg- spear- shaped^ flat, simple or 



with 2 divisions : Florets alternate, on a zigzag 

 fruit-stalk. 



E'LYMUS. Involucrum of 4 leaves, containing 2 flowers: 



Flowers compound. 



LO'LIUM. Involucrum 1 leaf, containing 1 many-flow- 

 ered spiket. 



CYNOSU / RUS. CaL 2 valves, containing many flowers: 



valves strap-shaped, tapering to a point, equal : 

 Nectary or 2 leaves. 



[Carex, Alopecurus pratensis, alpinus, & agrcstis.] 





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