CYPERACEAE 179 
s pq fusiform: seales ii or abruptly pointed: aehene mostly 4—4.5 
i ut d as long a a erianth- pine the tubercle about thrice 
four eae as l as the achene.—( HORN H.)—Ponds, M swamps, 
and pns Coastal Plain and New England Gu Fla. to Mas 
4. R. Careyana Fernald. Stem and leaves resembling those of R. corniculata 
and È. inundata, the D like the latter widely stoloniferous: inflorescence 
effuse, the ters ra V er lax: spikelets loosely spreading: seales aeute to 
abruptly pointed: achen UN about 4 mm “Jong, about 14 as long as the 
perianth- ier the iubere nearly thriee as long as the achene.—( HORN 
H.)—Marshes, ponds, ditches, low pinelands, Fla. 
5. R. macrostachya Torr. Stem up to 2 m. tall, 3- fon Me solitary is some- 
what tufted, but not NUT d leaf-blades. mostly less than 2 cm. wide: 
spikelets in one or several dense fastigiate clusters, Pisiform sales pus Or 
acuminate and often slender-tipped: achene y obovate, 5 
much shorter than the perianth-bristles, the tuberele thriee or four times as 
long as the achene. [R. corniculata macrostachya Britton.]— (Hor NED- nid) ) 
—Swamps, marshes, ponds, and wet pinelands, sean in salt-marshes 
various oou Fla. to Tex. "SE Kans., Mich., and E Mass.—The frui t ehar- 
acters as given above fail occasionally in eee s from t of ex "Missis- 
sippi River, which have narrower achenes and Short bud. ‘bristle 
R. intermixta C. Wright. Stem 1-3 dm. tall, filiform or capillary: leaf- 
blades da M the stem, but more slender, curved: spikelets elliptic-ovoid, 
about 2 mm. long, borne in 1-3 s separate lax clusters: ene obtuse or abruptly 
oid, 
pointed, 1.5-2 mm. long: achene ellipsoid- -obovoid o eate-obov 
long or nearl 80, transversely wr d . Whitish, ES puce: 
perianth-bristles, the tu bre small, depressed. [5 P silla M. A..Curti xu 
Pineland swamps, Coastal Plain, Fla. to Tex.—(W 13 
divergens M. A. Curtis. Stem 1.5—4 dm. tall, filiform or wi iry: leaf- 
blades resembling the stem but more slender, curved: spikelets borne in loose 
or somew $a Rue ntraeted corymb-like cymes, elliptic Fi ovoid-elliptic, 3-3.5 
ong, a seales aeute or mueronulate, 2-2. du . long: achene broadly 
obovoid c rbieulr oed much | tha n 1m te ng, nii bs the 
bas mpanied with pe e pr s the iub much depressed.— 
Moist pinelands, Coastal Plain, Fla. to S. C—(CW. I.) 
8. R. Videndum M. A. Cur Stem 2—6 dm. tall, filiform: leaf-blades re- 
sembling the stem but more sender: spikelets borne in usually a solitary termi- 
al cluster, fusiform, 3—4 mm. long: scales d d mucronate, 2-3 mm. long: 
achene oval, fully 1 mm. Tu smooth and ing, not aecompanied by 
an 
Pen -bristles, the tubercle deltoid, ne slightly depressed.—Low 
pinelands, Coastal Plain, Fla. to La. and N. C. 
9. R. pallida M. A. Curtis. Stem 1-6 dm. tall, stoutish: spikelets numerous, 
borne in a mostly PA terminal dense cluster, fusiform, 4-6 mm. long: 
PM acuminate or abruptly pointed, 2.5—4 m E perianth- “bristles Mat 
short, a Or W E Do achene obovoid- ‘ellipsoid or oval, about 1.5 
long, ooth, the tu bercle inconspicuous, minute, depresse d.— Àcid "OE 
i Coastal Plain, N. C. to N. Y. 
R. Rappiana Small. Similar to E. d in ae, Aa peed and with 
ne leaf- blades: spikelets rather num bor ngle terminal 
cluster, gene a colored, 5-6 m ng desc cnn abruptly short gun 
mo stly 3 long: perianth- bristles v Nan short or wanting: ae sub- 
ae neue orbi ae about ong, pale, minutely ied m ‘tubercle 
prominent, pate ee depressed Mies E E pen. Fla. 
