574 



CYPERACEjE. 



Rottb.— Several feet high, glaucous, glahrous; leaves 4'" broad; head 1" (-3") long, rarely 

 compound.— Hab. Trinidad!, Cr.; [Panama!, Guiana!, Brazil]. 



68. R. comata, Lk., Schlecht. Covered with short down, (or glabrescent) ; stem 

 3-augular j leaves long, flat ; spikelets pale-brown, glabrous, ovate-conical, pedicellate m 

 axillary, peduncled and terminal compound racemes or corymbs : bracts setaceous ; glumes 

 elliptical, awued-mucronate ; achenium obovate, margined, smooth, brown-rusty, shorter 

 than the conical-subulate, greenish beak, exceeded by the upwards scabrous bristles.— K. 

 bromoides, Kth. R. sylvatica, Ns.— 2'-4' high, glaucous ; leaves numerous, 3"'-5 broad ; 

 spikelets 3'" long, somewhat shiniug.— Hab. Trinidad !, Cr., Lockh., on roadsides ; [Panama !, 

 Guiana, Brazil]. 



69. R. gracilis, V. Stem slender, obtusely 3-gonal; leaves narrow, flat, glabrous ; 

 spikelets brown, ellipsoidal-conical, glomerate in axillary, peduncled, and terminal small 

 cymes : bracts linear-setaceous ; glumes ovate, or ovate-lanceolate, lower small ; achenium 

 elliptical -roundish, transversely wrinkled, pale-brown, longer than the short, conical, green- 

 ish beak, usually little shorter than the upwards scabrous bristles.— Schcenus, Sw. (sec. 

 V.). R. glauca, V., Kth. R. filiformis, Sieb. Mart. 383 !— Habit of R. fusca, but higher, 

 2'-4' high ; leaves 1'" broad; spikelets 2'" long- Hab. Jamaica!, Pd., Al., Wils., M'Nab, 

 in mountain-bogs ; [Haiti ! aud Mexico to Brazil !]. 



Sect. 2. Haplostylis, Ns. — Flowers supported by bristles. Style minutely 2-dentate 



at the filiform summit, or subentire. 



* Spikelets in a single, terminal head. 



70. R. barbata, Kth. Stem slender, simple, angular ; leaves narrow, keeled, pilose 

 beneath and along the margin ; spikelets pale-rusty, ovate-lanceolate, in a globose, terminal 

 head : involucre exceeding it ; leaflets herbaceous, acuminate, ciliate ; glumes obloug-lanceo- 

 late ; achenium brown, smooth, elliptical, cymbiform by inflexed, marginal, pale wings: 

 wings passing upwards into the flatfish, membranaceous, subtruncate beak, which is as broad 

 as the achenium : bristles much longer than the achenium, pilose at the base. — Schcenus, V. 

 Haplostylis, Ns— 8"-12" high ; leaves l"'-4'» broad ;• head 4'"-5'" diam.— Hab. Trinidad !, 

 Cr., in savannahs; [Panama!, Guiana!, Brazil]. 



71. R. globosa, R. S. Stem rigid, simple, angular ; leaves involute-filiform, rigid; 

 spikelets pale-rusty, ovate-lanceolate, in a hemispherical, terminal head : involucre exceeded 

 by it : leaflets coriaceous, roundish, mucronate, or awned, rusty ; lower glumes ovate, su- 

 perior oblong-lanceolate ; " achenium rusty, smooth, obovate •. beak short, pale, conical : 

 bristles long, pilose to the summit. — Presl, Reliq. Hank. 1. t. 36. — Cephaloschoenus, Ns. 

 2'-4' high, naked above the base ; head 6"'-8"' diam.— Hab. Trinidad !, Lockh., in moist 

 savannahs ; [Mexico to Brazil!]. 



72. R. curvula, Gr. («. sp.). Stem rigid, filiform, low, simple; leaves all csespitose, 

 short, incurved, rigid, channelled-3-quetrous, linear- acuminate, bluntish at the top ; spikelets 

 pale-greenish, linear-acuminate, sjireading, 5-8 in a single, terminal cluster : involucre 

 obsolete, of minute scales ; lower glumes and involucre scales ovate, bluntish, superior glumes 

 lanceolate- linear ; achenium (young) lanceolate-oblong, subtruncate : beak very short, conical, 

 jointed at the base, narrower than the achenium •. bristles long, unequal, densely pilose to 

 the summit. — Allied to the preceding, but stems only 5"-6" high, several from the same 

 dense tuft of leaves; leaves \\"-\" long, nearly devoid of sheaths; spikelets 3'" long, acu- 

 minate. — Hab. Trinidad !, Lockh., in woods. 



** Spikelets in umbellate, or fascicled, globose heads ; achenium jointed with the beak. 



73. R. cyperoides, Mart. Stem slender, 3-gonal ; leaves linear ; heads globose, 

 rusty-brown, unequally umbellate, the central sessile ; spikelets ovate, acuminate ; lower 

 glumes ovate, superior ovate-lanceolate • achenium rusty, obovate, smooth, jointed with the 

 beak : beak pale, subulate-linear, much narrower than and about as long as the achenium, 

 which is exceeded by the' scabrous bristles. — Mart. Ft. Brms. 3. t. 12. — Schcenus, Sw. ! S. 

 polycephalus, Pers. (Rhynchospora, Wydl., Ephippiorhynchium, Ns.) S. triceps, V. R- 

 aurea, Sieb. Mart. 8. Ephipphiorhyuchium tenuirostre, Ns. I, a form with few heads.— 

 r-2' high; heads 4"'-6'" diam.— Hab. Jamaica!, Sw., Pd., Wullschl. ; Trinidad !, Lockh., 

 .Cr. ; [French islands ! and Mexico to Brazil !]. 



