54 33. Trasus. 9. CYPERACE^. Pl.end.pL 



h. BractecB leaflike : fruit downy ; 

 spikes sessile, or with sheathed footstalks. 



Male spike 1 ; female 2 or 3 ; 

 Iractece sheathing T. prcBCOx. 5. 



Male spike 1 ; female 2 or 3 ; glume short ; 

 hractece amplexicaul ; culm, upright T. tomentosus. 6. 



Male spike 1 ; female 2 or 3 ; glume long; 

 Iractece amplexicaul; culm lying down . . T.piluliferus. 7. 



Male spik.iS 2 ; female 3, cylindrical, brown ; 

 fruit hirsute; plaut hairy T. hirtus. 8. 



Male spikes 2 ; female 2, ovate, oblong, black ; 

 fruit woolly ; plavt smooth T.fliformis. 9. 



c. BractecB leafiike ; fruit smooth ; 

 spikes sessile, or with a footstalk enclosed in a sheath, 



BractecE amplexicaul ; culm acute-angled ; 

 fruit inflated, beaked T. vesicarius. 10. 



Bractecs amplexicaul ; C7ilm obtuse-angled ; 

 fruit inflated, beaked T. ampullaceus. 11. 



BractecB sheathing ; culm smooth ; 

 fruit beaked, beaks recurved T.flavus. 12. 



BractecB sheathing ; culm smooth ; 

 fruit beaked, beaks straight To Oederi. 1 3. 



d. BraclecB leaflike, sheathing; fruit smooth ; 

 spikes upright, upper ones sessile, lower footstalked 

 ' exserted, male 1. 



Fruit beaked, 2-cut ; glume 3-ribbed ; sheath short ; 

 culm smooth ; ligula T. extensus. 14. 



Fruit beaked, 2-toothed; glume 1 -ribbed; sheath long; 

 culm smootli ; ligula long, acute T. Hostianus. 15. 



Fruit beaked, 2-toothed; glume 1 -ribbed; sheath long; 

 culm rough ; ligula T.filvus. 16. 



Fruit beaked, 2-cusped; glume 3-ribbed; sheath long; 

 culm smooth ; li^rula short, blunt T. distans. i 7. 



Fruit beaked, 2-lobed, 2-ribbed; glume 1-ribbed; 

 sheath long; culm smooth ; ligula T. liinervis. 18. 



Fruit obtuse, not nicked; root creeping; 

 sheath long; culm smooth T. paniceus. 19. 



Fruit beaked, scariose, not nicked; root fibrous; 

 sheath short; culm smooth T. depauperatus. 20. 



