rinato -navienlaribus Zate ovatis v. ovalibus, obtusis ‚muticis 
v. maeronulatis, nervulosis, earina viridibns, disco membrana- 
ceo siramineo -purpurascentibus v. afrosanguineis; siylo ex- 
serto ad medium trifido; caryopsi minuta sqguama cire. '% 
breviore rotundo-obovata v. ohovato -ellipsoidea compresso- 
triangulari mucronata punctulata v. laeviuscula stramineo- 
pallida; stamine unico caryopsin snbaequante, — Perigon. 
aullum. 
S, nigricans Spr. Syst. i, 212. — Willd. hb. no. 1199. 
Isol. nigricans Humb. et Kunih, — Kunth, 193. Is. psdlo- 
carpa Kre in Poepp. coll, pl. Chil. I. 1%. Is. vivipara 
Schrad. in Herb. Chamiss. pro parte. — Desv. Fl. Chilena 
189. — Is. Valdiviae Steud., 94. — W. Lechler. pl. Chilens. 
ur, 453, 1456. — Forma (aquatilis) Naccida culmis foliisque 
elongatis (illis ad 9 pollic. long., his 3-—4-polliear.) spiculis 
parum minoribus, caryopsi (vix semper) biconvexa: Isol. tri- 
stachya Phil, in Herb, Berol. 
Peruvia. Chili. 
4a. 8. bicolor Spreng. 
Viridis. Rhizomate elongato descendente Alifermi caespiti- 
fero ad nodos radicante; culmis pluribus striete ereetis (3—8- 
pollic.) sefaceis compresso-angulatis striatis basi pluröfoliatis, 
uno alterove apice prolifere; foliis eonfertis subrecuryato-pa- 
tentibus culmo parum brevioribus v. longioribus rigidulis 
exacte linearibus perangustis ("« lin. lat:) obtusissimis snb- 
canaliculatis striolatis; capitulo laterali e spienlis 5—7 com- 
posito subtriangulari; involueri diphylli foliolo inferiore erecto 
capitulum param superante, altero rellexo spienlas subaequante; 
spieulis congestis rotundo-ovatis obtusis teretibus (sesquilineam 
eire. long.) pluriforis; squamis chartaceis deusis squarrosulis 
ovatis carinato-navieularibus e carina latiuscula viridi obtuse 
