CYPERACEAE 
Achene eae obovoid, much less 
than 1 mm. wide. 
MN broadly obovoid, about 1 mm. 
Fz a bristles about as long as the 
Spikelet-seales very broad, suborbicu- 
A: eniform, mostly less than 3 
un 
Spikelet-scales narrow, ne to 
elliptie, mostly over 3 mm. lon 
porn Dee much longer 
Achene without a stipe-like base, the 
tubercle conic-subulate. 
Achene with a stipe-like base, the tu- 
bercle pc 
Leaf-bla - 
Perianth-bristles much pera than the achene, 
times very short. 
Leaf-bla ER z. .D- 3 mm. wide: spikelets 2-5 
on 
Leaf-blades narrowly linear: spikelets 4- 
Leaf-blades s bristle like, filiform: spikelets 
Leat blades "aio p) wide: spikelets 6-8 
Achene cancel s 
Leaf- EAT any 1 linear, blunt or merely acute: 
e 
Leaf-blades DR ON linear, attenuate. 
Achenes 2.5 mm. long, equalling or Shorter than 
the Dris tle 
Achen n 2 2. mm. long, much longer than the 
Spikelets ellipsoid or ovoid-ellipsoid, 2.5-3.5 
. long: tubercle not constricted at the 
bas 
Spikelets globose-ovoid, about 2 mm. long: 
ube nd constricted at the base 
Achene transversely wrinkle 
Perianth-bristles enorter than the achen 
Leaf-bl ms filiform: spikelets filiform- 
lades and stem 
edicelled, stalked. 
Leaf-blades flat or involute, not filiform : 
sessile or short- -pedicelled, stalked. 
Leaf-blades involute 
Achene flat, 1.5 ‘mm. long, continuous with 
the tubercle. 
chene strongly biconvex, 2 mm. long, con- 
stricted under the tubercle. 
Leaf-blades flat. 
eer eee hae not constricted under the 
spikelets 
Achenes 1 mm. E tubercle depressed, 
wider than 
Achene ellipsoid, decideuiy longer than 
I uy 1 wide, finely 
Achene o e about as 
S wide, fully 1 mm. wide, 
ned wrin 
Cymes many r les 
nodding: ‘tubercle donfucnt with 
the achene- 
e pM erect: tuber- 
with ring-like base, thus 
a 
en differentiated from the 
body. 
achene- 
25. R. 
on 
N 
CO 
Q2 
d 
38. 
e 
42. R. 
eJ 
. R. 
fusca. 
. Harperi. 
distans. 
- solitaria. 
. gracilenta. 
Smallii. 
Baldwinii. 
. fascicularis. 
. Wrightiana. 
dodecandra. 
ciliaris. 
Grayi. 
Harveyi. 
. pinetorum. 
rariflora. 
Torreyana. 
Earlei. 
Edisoniana. 
. perplexa. 
globularis. 
