CYPERACEAE 
II. CORNICULATAE 
Achene ellipsoid-obovate, much longer than wi 
Perianth- I Shorter than the achene: e achene 
5-6 m 
Perianth | rer about twice as long as the achene: ma- 
ture achene less than 5 mm. long. 
Achene broadly- obovate, slightly longer than wide. 
Inflorescence effuse, the prim e oo mur is with few Spike- 
nd S us ae less an 5 long: perianth-bristles 
ua 
lüforescence fastigiate, the primary glomurels with many 
(10—50) EE Ne achene 5-6 mm. long: perianth-bris- 
tles usually 6. 
III. PUSILLAE 
Achene transversely wrinkled. 
Achene ues or ur 
Ac e ae culate, 0.5-0.7 mm. long: spikelets loosely cor- 
Aches po 1.5-2 mm. long: spikelets corymbose-cap.- 
Stem ‘leaves with blades 0.7 mm. wide or less: spikelets 
Stem-leaves with eem 1.5-2.5 mm. wide: spikelets 
AEE ET ut "E 5 long, obovoid-ellipsoid or 
oval, 2M pitted. the tubercle minute, incon- 
2 long, suborbicular or oval- 
orblenlar, ers ie the tubercle prominent. 
IV. PLUMOSAE 
Spikelets solitary or 2-4 together, 6-8 mm. long. 
Spikelets numerous, clustered, 2.5-4 mm. long. 
Perianth-bristles plu umose nearly or quite pA the top. 
tems slender, 1 .5-3.5 dm. tall: spikelets small. 
Stems stout, 3-6 dm tall: spikelets large. 
Perianth-bristles plumose below the middle or only near 
V. GLOMERATAE 
BEIE a barbed. 
Scales pale-green or white: perianth-bristles 9-24. 
pe hene broadly ellipsoid or ellipsoid-obovoid : perianth- 
bristles ipae doe than 15. 
ME turbinate-obov 
h-bristles mostly more 
Scales boom perianth-bristles 6. 
. Sp ne dd to numerous in rather loose, often pani- 
sters. 
Spi pikelets many together in clusters; scales dark- 
wn 
Achene about 1. 5 mm. long, the body broadly el- 
lipsoid bos the stipe-like base. 
no about 2 mm. long, the body subglobose 
ove the stipe-like ase. 
Spi eres few in distant clusters ; scales pale-brown. 
Spikelets numerous, in 2-4 dense globose clusters. 
Spikelets 5-6 mm. long: achene 2.5 . long. 
Spikelets 3-3.5 mm. long: achene 1.5 mm. long. 
Bristles ea barbe 
Achene ooth or cancellate, not transversely wrinkled. 
conos smoo 
Tubercle of ‘the achene ciliate to serrulate. 
Leaf-blades flat. 
Leaf- E ane 
involute, filiform or 
Achcue Tinear- oblong: perianth-bristles much 
mm. long or less, light-brown. 
Achene 1.5-2 mm. long, dark-brown. 
eu 
d 
e 
10. 
"n 
Or 
20. 
21. 
d! 
24. 
28. R. 
R. 
. corniculata. 
inundata. 
. Careyana. 
. macrostachya. 
. intermirta. 
. divergens. 
. Chapmanii. 
. pallida. 
. Rappiana. 
. oligantha. 
plumosa. 
intermedia. 
. semiplumosa. 
. alba. 
macra, 
capitellata. 
glomerata. 
leptocarpa. 
acillari 
"icsoceahdid: 
fuscoides. 
Curtissii. 
filifolia. 
