CYPERACEAE 
rv: of ae spikelets mens 
Achene nearly 1. . long: scales about 3 
Ini ong. 
Bene qu 1 mm. long: scales 2 mm. long 
Spikelets in stiff clusters, spreading. 
le mm. 
ike E: 5-2 wide: achene 
much r % as T as the scale. 
Spikelets bs or less: achene 
i mm 
slightly over 1e 2 as long as the scale. 
s in soft p e-like, often dense, 
lusters, erect $ oa ng. 
Scales of the spikelets prominently Short-pointed be- 
yond the scarious margin 
II. SABULOSI 
Achene less than 1.5 mm. long, about Esas the sub- 
tending scale. 
III. LAEVIGATI 
Spikelets few, in a cluster, appearing lateral on the s 
one inv 
tipped, 
Spikelets nome us, in a terminal erect head: several in- 
volucral Binet Slongate and spreading: anther blunt, 
Jess than 1 mm. lon 
cape: 
oluc erie m. Tome. elongate and erect: anther donder 
IV. CUSPIDATI 
Scale-body acute or rounded at the base of the awn: achene 
cuneate-obovoid. 
Scale-body Oecd at the base of the awn: achene obovoid. 
V. Com 
Spikelets in stiff clusters: achene less ibis pe as Sloane as 
the scale. 
VI. IRI 
d in DON like clusters: achene as dong as the sub- 
Ing S 
VII. ELEGANTES 
Spikelets crowded; scales with ciliate-serrulate keels. 
VIII. VIRENTES 
Young spikelets long and narrow; scales persistent. 
Young spikelets short and broad; ' scales deciduous. 
Achene linear or narrowly ellipsoid, over 1 mm. long. 
ch ene 2 oM ellipsoid : spikelet-scales about 2.5 
mm 
Achene linear : spikelet-scales about 2 mm. 
long. 
Achene oval or broadly ellipsoid, less than 
1 mm. long. 
IX. DISTANTES 
Spikelets in irregular spikes, very slender 
X. HASPAN 
Spikelets linear to linear-lanceolate, oue 1 mm. wide: 
involueral bracts 2, erect or ascendi ing 
XI. ALTERNIF 
Spikelets ovate to elliptie, 2-2.5 mm. E 
bracts numerous, spreading and droopin 
LII 
involueral 
XII Esc NTI 
Seales of the 2 M with lax or E A 
mucronate ti 
mea n the apielsts bs serene obtuse, acute, or ob- 
urely mucronulate t 
ree 16 as PA 2 us ‘scale or less: scales blunt, 
od a the a 
16 AE lon g as the seale or more: scales 
lunt, or mucronulate, not hooded at the 
a E 
PEE of bed br partly reddish-brown or pur- 
row 
Spikelets of EU feos or yellowish-brown scales, 
13. 
14. 
. C. 
11. C. 
C. 
ao 
. C. 
. C. 
; C. 
. ©. 
. C. 
filicinus. 
microdontus. 
paniculatus. 
odoratus. 
pumilus. 
. sabulosus. 
laevigatus. 
Careyi. 
in flezus. 
cuspidatus. 
compressus. 
Iria. 
elegans. 
ochraceus. 
143 
virens. 
pseudovegetus. 
surinamensis. 
distans. 
Haspan. 
alternifolius. 
dentatus. 
Le Contei. 
rotundus. 
