CYPERACEAE 187 
fect and fruetiferous. Scales rather loosely imbricate, broad. Perianth want- 
ing. Stamens 2. Ovary sessile: style deciduous. Stigmas 2 or 3. Achene 
short, ium ovoid, inr -lenticular or obscurely 3-angled, striate or wrinkled, 
not tubercled. [Cladium P. Br.]|—About 40 species, most abundant in warm 
regions.—Sum.-fall. 
Achene with a broad flat base which often has a flaring edge: 
leaf-blades smooth or nearly so. 1. M. mariscoides. 
Achene with a narrowed base: leaf-blades with spinulose-serrulate . . 
margins and midrib beneath. 2. M. jamaicensis. 
- M. mariscoides (Muhl.) Kuntze. Stem up to 1 m. tall, obseurely 3- i in 
ith stiff branches: leaf-blades Maru. 3 mm. wide or less, nearly smooth 
His of spike lets on rigidly erect or as- 
cending branches: d i pas : 
long: achene ovoid, 3-4 mm. long, including 
the ium like tip, cma striate, the 
flat base often 2 a RE edge. — (Po ND- 
USH. TWIG-RUSH.)—Swamps , marshes and 
wet sandy shores, = provinces, Fla. to 
Ala., Minn., and N. S. 
2. M. jamaicensis (Crantz) Britton. Stem 
lax branches: leaf-blades d | mm. wide 
or ro spinulose-serrulate on the margins | 
midrib mun d. clusters of 
an the 
spikelets on lax, often pas branches: 
3.5 m 
larger scales less than g: achen 
ovoid, 2-2.5 mm. long, 1 a or abruptly short- t-pointed, buoni narrowed at 
the bas e. [C. effus (Sw.) Torr.]—(SAw S.) —Swamps and ced 
mostly less than 100 ri above sea-level, Coastal "Plain, Fla. E 2 Ue 
(W. I. : mass and large areas ‘of pur e saw 
ex., C. A., S. A.)—In 
grass excels any other sedge in our ra us It is the mu EE of 
the Everglades and of other marshes, and also o swamps ranging from saline 
to fresh. The numerous very sharp-edged leaves make progress through col- 
onies of it diffieult. 
~ 18, REMIREA Aubl Perennial gregarious caulescent herbs with elongate 
horizontal rootstocks. Leaves numerous, crowded, imbricate at the base: 
blades not elongate, striate. pikelets sev- 
eral or pus in a sessile terminal involucrate 
s few, closely imbricate, short 
igmas 3. ch 
narrow, d-angled, not tubercled—A single 
species, widely distributed in the tropics. 
E ritima Aubl. Stem 1-3 dm. tall, 
ane intervals along the elongate ae 
E simple: leaf-blades recurved-spreading, 
2—10 em. long, attenuate, smooth: head ovoid, 
1-2 em. long: spikelets 3-5 mm. long, slightly 
curved: scales hooded at the apex: achene narrowly ellipsoid, 2-2.5 mm. long 
or rarely longer, obtuse.—(BEACH-STARS.)—Sand-dunes along the beach, east- 
