9. CYPEtlACEiE. 33. Trasus. 55 
PI. end. ph. 
e. Bractece leaflike, amplexicaul ; spikes upright , 
upper ones sessile , lower foot stalked , male 2 or 3. 
Glumes acute ; 
male spike 3-sided ; female cylindrical .... T. riparius, 21. 
Glume of the male flower blunt, of the female 
acute, awned ; spikes cylindrical . * T. paludosus. 22. 
f. Bractece leaflike , sheathing ; spikes drooping , 
upper ones sessile , lower footstalked, exserted, male 1. 
Fruit crowded, ovate, acute ; 
leaves broad T. pendulus. 23. 
Fruit lax, lanceolate, 3-sided, ribbed ; 
leaves narrower T. strigosus . 24. 
g. Bractece leaflike, sheathing; fruit smooth; 
spikes footstalked, drooping. 
Female spike lax, filiform ; 
fruit ovate, beak long T. sylvaticus . 25. 
Female spike ovate ; 
fruit ovate, 3-sided, pointed, smooth .... T. capillaris. 26. 
Female spike ovate; 
fruit elliptic, compressed, beaked, edge rough. 
T. ustulatus. 27. 
h. Bractece leaflike , sheathing; spikes upright, 
footstalked, exserted. 
Fruit smooth T. Icevigatus. 28. 
Fruit rough T. erectus. 29. 
i. Bractece leaflike , amplexicaul ; fruit smooth ; 
spikes footstalked. 
Root creeping ; female spike ovate ; 
fruit elliptical, compressed T. limosus. 30. 
Root creeping ; female spike cylindrical ; 
fruit elliptical, 3-sided, roughish T. glaucus. 31. 
Root creeping ; female spike lax, fewflowered; 
fruit obovate, obtuse, smooth T. rariflorus. 32. 
Root fibrous ; spikes manyflowered ; 
fruit 3-sided, furrowed, beaked T. chlorostachyos. 33. 
Root fibrous ; 
fruit elliptical, inflated, obtuse ......... T.pallescens . 34. 
