CYPERACEAE 
pikes globose or Hd or globose-ovoid. 
Spikes paniculately branched, compound. 
Spikes npud cylindric : spikelets ellipsoid or 
ellipsoid-ov 
Spikes lax or stiff, ‘the spikelets loosely spreading. 
Spikele ded slender, linear-subulate to subulate, 4-8 
mes as long as wide. 
Spikelets CER PUDE on the rachis; scales over 
ng. 
Spikelets ‘separated on the rachis; scales less 
ong. 
Spikelets SEDE 7 linear-elliptie to elliptie, 2-3 times 
ng as wide. 
Spikelets posed to yee bearing 8-12 achenes: 
scales not appre 
Spikelets oo or = yenlowialt: green. 
Spikelets less than 2 mm. wide: achene ellipsoid, 
about 0. 5 mm. vide 
S elets 
ae mm. wide: achene obovoid, about 1 
achis-wings obsolete ‘or very narr 
Inflores a 
rachis stout. 
Rachis-wings broad, partly enveloping the achene. 
III. SPECIOSI 
Seales of the spikelets distant, the successive scales on 
either side remote aN m the bases of those above them : 
achene linear-ellipso 
Scales of the spikelets mafesi imbricate : achene broader. 
Achen Se Di. P ud obovoid, or ellipsoid-obovoid, 
nequ 
Spikes pipe sh or grayish-brown ; as firm: 
achene obovoid, sometimes narrowly 
pikes dull- brown; scales thin: achene ‘ellipsoid or 
CIE oid:obovel 
Achene broadly obovoid or obpyramidal, equilateral. 
ns L. Plant ee tufted, up to 4 dm. 
C. flav 
S E clustered linear, 8-1 eee straw- Colored. 
mm. long, or obtus ish, EU 
pec cuin. UE id, or subo aes hed 
1 mm. long, about % as long as the scale, M 
vou a pe 
Y S. 
PAS 
222 
: 
variou 
T 
Ce 
bla ae —Low 
poe Fla. to 
( 
Tex., Mich., 
W. I., Mez., C. A., O. W.) 
[i 
oc 
NS. 
SS 
T. 
p? 
2. C. diandrus Torr. 
ER 
ae, 
Plant annual, T 
ted, 
stigmas E usly exserted 
scales: achene obovoid, often pb y 
80, 
bct m mm. dong, a about 14 as long as the scale, brown 
n 
52. C. globulosus. 
53. C. ligularis. 
54. C. cayennensis. 
55. C. hermaphroditus. 
e 
e 
Q 
. dissitiflorus. 
57. C. tetragonus. 
58. C. multiflorus. 
59. C. filiculmis. 
60. C. Blodgettii. 
61. C. fuligineus. 
62. C. brunneus 
63. C. Engelmannii. 
64. C. ferax. 
65. C. speciosus. 
66. C. longispicatus. 
tall, ies iig 
scales o e, abou 
or gray.—(CYPRESS- 
rounds, swamps, and marshes, various provinces, Ala. to Nebr. 
nth. Similar to C. diandrus in habit: Vii clustered, 
3. C. rivularis K 
ovate, elliptic, or Dons linear, 8-20 mm 
| i vate o rhombic-ovate, about 3 m 
id pa eA obtuse, ue 
SOT fully 1 m. long, a 
. long, with bro oad brow 
ong as the scale, 
. long, somewhat shining: scales firm 
B 
wn margins or brown, 
stigmas slightly exserted: | achene broadly 
s lo 
brown.—Wet soil or 
out 
low ground, chiefly à along doin or pode various pone "N. C. to Ark, 
Ne E and Me. 
nen 
