142 CYPERACEAE 
articulates above the lower pair of scales or with each joint of the rachis when 
it breaks up into l-fruited sections, the d of the rachis often iyd 
Flowers perfect. Perianth wanting. Stamens 1-3. Style deciduous. 
Stigm 
2 or 3. Achene lenticular or 3-angled. ae 600 21 pes mons 
ES. SWE 
in warm regions.—Sum.—fall, or all year S.— QALIN 
HES . m 
The tuberous-thickened rootstocks of some species are H as hon 
Stigmas 2: achene of a. lentieular t 
Achene e ud ars ( SUDsendE I. Pycreus.) 
chene m than the subtending Scale: 
Achene Shae FE Mone as the subtending scale. 
Achene dr flattened. Ceca S Ii. Juncellus.) 
Stigmas 3: achene of a triquetrous type. 
Spikelets E on the spike-rachis. (Subgenus 
. Eucyperus. 
Wings of the spikelet-rachis, if any, very narrow. 
Plant annu 
Scales of the spikelets awn-tipped. 
Scales of the spikelets obtuse, acute, or merely 
acuminate. 
Achene ae shorter than the subtend- 
ing sca 
Bo as long as the subtending scale 
and 
Plant € 
Scales of the spikelets appressed, Con EROU: 
the rachis- B very Shor 
Stamen s 3: lea E vise s 
Stam md leaves not viscid. 
Seales of. the Sbikelets mot o eed distant, 
une SS CM odes % as long as the 
es or 
Wings of the spikelet-r radhis prominen often very 
broad, persistent or deciduou 
Rachis-wings persistent : TA perennial, 
e n ; 
Leave 
"d ^ of the s 
Inflorescence subtended by an invo- 
lucre of 2 short er ect or ascending 
numerous elongate spread- 
d and drooping bracts: spikelets 
end: shining. 
with Tonea e inean blades. 
Scapes node © nearly tere 
ees oe deciduous as inicios Scales: plant 
Spikelets "deciinotis above the lower pair of scales, or 
reaking up into 1-fruited sections. 
Spikelets deciduous above the lower pair of scales. 
ubgenus IV. Mariscella. x. 
ry narrow. 
Achene less than thrice as lon ng as thic k. 
dE breaking up into 1- fruited sections. (Sub- 
genus V. Torulinium.) 
I. FLAVESCENTES 
chene orbicular-obovoid or suborbicular, the superficial 
cells oblong. 
Achene ellipsoid, obovoid, or linear, the superficial cells 
Seales of the spikelets obtuse, acute, or mucronulate. 
Achene Ne a broadly SO. 
Sta s 2: stigmas much exserted beyond the 
stamens 3: stigmas included, or only slightly 
rte 
Nene incar d ellipsoid, oval, or narrowly obovoid. 
Scales of the spikelets obtuse. 
I. 
II. 
TII 
IV. 
vV. 
VI. 
VII. 
VIII. 
IX. 
FLAVESCENTES. 
SABULOSI. 
LAEVIGATI. 
CUSPIDATI. 
COMPRESSI. 
TRIAE. 
D 
VIRE 
DISTANTES. 
. HASPAN. 
XI. ALTERNIFOLII. 
XII. 
XIII. 
XIV. 
XV. 
XVI. 
XVII. 
XVIII. 
ESCULENTI. 
ARTICULATI. 
ERYTHRORHIZI. 
STRIGOSI. 
iom 
TETRAGONI. 
SPECIOSI. 
1. C. flavescens. 
2. C. diandrus. 
3. C. rivularis. 
4. C. densus. 
