574 CYPERACEJ!. 



Bottb.— Several feet high, glaucous, glabrous ; leaves 4'" broad ; head 1" (-3") loDg, rarely 

 compound.— Hab. Ti-inidad!, Or.; [Panama!, Guiana!, Brazil]. 



68. R. comata, Lk, Schlecht. Covered with short down, (f>T glabresoent) ; stem 

 3-angular ; leaves long, flat ; spi/eelets pale-brown, glabrous, ovate-conical, pedicellate in 

 axillary, peduncled and terminal corn-pound racemes or corymbs : bracts setaceous ; glumes 

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

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

 bromoides, Kih. R. sylvatioa, iV«.— 2'-4' high, glaucous ; leaves numerous, 3"'-5"' broad ; 

 spikelets 3'" long, somewhat shining. — Hab. Trinidad I, Cr.,LocM., on roadsides ; [Panama !, 

 Guiana, Brazil]. 



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

 spii:elets 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 beah, usually little shorter than the upwards scabrous bristles. — Schoenus, Sw. {sec. 

 K). K. 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 I, P^^., ^/., Wils.,M'Nab, 

 in mountajn-bogs ; [Haiti 1 and Mexico to Brazil I]. 



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 herbaoeotts, acuminate, ciliate ; glumes oblong-lanceo- 

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

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

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

 Haplostylis, Ns.—W'-li," high ; leaves l'"-^'" 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, muoronate, 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. Hcenk. 1. t. 36. — Cephaloschoenus, 'Ss. — 

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

 savannahs; [Mexico to Brazil!]. 



72. R. ourvula, 6r. {n. sp.). Stem rigid, filiform, low, simple; leaves all csespitose, 

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

 pale-greenish, linear-acuminate, spreading, 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 14''-1" long, nearly devoid of sheaths ; spikelets 3'" long, acu- 

 minate. — Hab, Trinidad I, Locth., in woods. 



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



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

 rusty-brown, M«ejwa% Mm^eWa^i?, 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. Fl. Bras. 3.t. 12. — Schoenus, Sw. I S. 

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

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

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

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



