182 CYPERACEAE 
fusiform, 4.5-6 mm. long: scales o 3-5 mm. long, chestnut-colored: 
perianth- “bristles ae tae of them longer than the achene: achene nar- 
rowly obovoid, about 1 mm. long, Eo constricted at the base, the tubercle 
pied RUD or acs late, shorter than the achene.—Around ponds, 
often eid soil, various provinces, Fla. to Ga., Miss.(?), Mich., Ont., and 
“0. W.) 
. Harperi Small. Stem 3-7 dm. tall, o leaf-blades involute, thus 
ifo rm or linear- PR x elets borne in usual or 3 loose- eT. 
e d en 5-5.5 mm. long: scales ae E N mostly 3-5 
wn: E verbe longer i. n achene: achene apoio. 
Rem 2 mm. zm n8, constricted into a so B -like base, smooth, the 
tubercle subulate, truneate.—Pineland pui "Coastal Plain, Ga. —Most closely 
related to E. le piorhyneha € = Wright, of Cuba, which was once recorded from 
Florida, pen tly ine 
27. R. distans d Vahl. Stem 2-7 Es tall, slender: leaf-blades very 
narrow, involute, s filiform or nde spikelets | e few together or 
several, in usu ally p» Or 4 head-like eymes, o - ong: scales muero- 
nate, dark- brown, 2-3 m ong: perianth- bristles mostly as ped as the achene 
Or p achene o en Or - orbieular-oval, varying to ovoid or obovoid, about 
1.5 mm. long, the t tube rele eonie-subulate, about one- ‘half as long as the achene. 
L Coastal Plain, Fla. to 5. = ) 
28. R. pec d Stem slender, 3-8 dm. tall, M ed leaf-blades 
about 2 m r less, mostly flat: spikelets in eae capitate clusters, 
narrowly ia. a a ceolate in outline, 5-6.5 mm. lon scales aristulate- 
tipped, pen mostly 3-6 mm. long: erianth- bus about as long as the 
achene: obovoid, Bb. En 5 mm. long, faintly pitted, the tuberele tri- 
angular o or ERN much shorter than the achene.—Moist pinelands, Coastal 
Plain, S Ga, 
29. R. aaan A. Gray. Stem = dm. tall, very pia a o leaf- 
tha A 
blades flat, or somewhat involute in drying, mostly les 
spikelets borne in 1-4 lax ae narrowly ov ee Tn mm 
acute or abruptly pointed, mostl 2-3 mm . long, Dro : perianth- e nh 
es than the achene: achene piss Or subglobose, about 1.5 m m. lon ng or more, 
mooth, the tubercle paper s long a e achene or lon pd —Low pine- 
D and acid p ADM Coas tal "Plain ur uta adi. provinees, Fla. to Tex 
and N. J.—(W. I.) 
30. R. Smallii Britton. Stem up to 1.5 m. tall, ae alae n ase flat, 
ub: 
: : own 1235 “mm 
long: perianth-bristles much longer than the achene: achene obovoid, some- 
times narrowly so, about 1.5 mm. long, smooth, the tubercle lanceolate, one- 
half as long as the achene or more.—Swamps and damp hillsides, Blue Ridge, 
, and various Mon Va. to Pa. and N. J. 
31. R. Baldwinii A. Gray. Stem stout, up to 1.2 m. tall, sharply 3-angled: 
oe 2—7 mm. wide, more or less glaucous: o borne e in 1-3 loosely 
capitate clusters, ovoid or ellipsoid-ovoid, 5-6 mm. long: scales aristate-tipped, 
ches tnut- -CO oa ed, 3-5 mm. long: perianth- bristles ren er than th 
achene oval or globo se-oval, fully 2 mm. long, minutely granular, the tubercle 
triangular conie, shorter than the achene. —Low ade Coastal Plain, Fla. 
to Miss. N. C. 
32. R. fascicularis (Michx.) Vahl. e d: up to 1.5 m. tall, often ob- 
seurely 3-angled: leaf-blades 1.5-4 mm. wide, more or s involute, but ee 
ery narrow: spikelets borne in me le ee head-like cymes, broa der 
ovate-lanceolate in outline, 4—5 mm. long or rarely smaller: scales i 
