trjakdria monogynia. 
293 
Culmus 6' 8 poli, altus. Folia pedalia, Hn. lata, li- 
nearia, plana, carinata, glabra. Involucri phylla structura 
foliorum. Umbella parva, 6-8 radiata, radii longiores, bre- 
viores brevissimi; radii partiales brevissimi, alterni. Spicu- 
la* 3-4 lin. longae, 6- 8 florae. Valvae carina viridi, lateri- 
bus pallidis. 
33(1. Cyperus strigosus, 
C. culmo triquetro, foliis culmo longioribus margine sca- 
bris, involucro subhexapliylio , phyllis tribus umbella 
longioribus, umbella composita, umbellulae radiis al- 
ternis, spiculis densissime aggregatis saepe reflexis li- 
nearibus acutis, valvis oblongis acutis striatis, stylo 
tripartito, nuce trigona subtruncata laevi. 
C. strigosus Linn. sp. pl. 1 * p. 69. Willd. sp. pl. 1. p.281. 
V^^ahi Euum. 2. p. 358. Michx. amer. 1. p. 28. Pursh 
amer. 1. p. 52. Miihlenbg. desc. p. 21. Roem. et Sch. 
syst. veg. 2. p. 214. Elliott Bot. of Car. and Georg. 1. 
p. 70. Spreng. syst. veg. 1. p. 226. Tori'ey Fl. of tlie 
Unit. 8tat. 1. p. 62. Link Hort. ber. 1. p. 317. 
C. Michauxiarius Roem. ct Sch. syst. veg. mant. 2. p. 123. 
Habitat in America boreali 2|-. 
Radix tuber subglobosum poli, in diametro, fibris de- 
scendentibus- Culmus 1-2 ped. altus, striatus, glaber, basi 
foliosus. Folia late linearia, striata, glabra, margine minu- 
tissime serrulata. Involucrum 4-6phyllum, phylla struc- 
tura foliorum, exterius umbella triplo longius. Umbella 4-6 
radiata; radii triquetri, inaequales, longiores bipollicares; 
basi oclxrea bifida rufescenti instructi; radii partiales 3-5, 
brevissimi. Spiculae circiter 20 in singulo radio partiali, 
densissime approximatae, alternae, basi bracteola lanceolata 
suffultae, 8-2'iflorae, pollicem longae, flavescentes. Rachis 
flexuosa. Valvae carina viridi, lateribus pallidis aut aureis, 
in varietate teneriore rubentibus. 
231. Cyterus erythrorizos. 
C. nmbella decomposifa, involucro 3-6phyllo longissimo, 
spiculis alternis linearibus horizontalibus subduode- 
cimfloris anguste linearibus, stylo trifido, nuce tri- 
quetra. 
C. erythrorizos Miihlenbg. descr. ub. p. 20. Torrey Cat. 
pl. New-York p. 13. Fl. of the Unit. Stat. 1. p. 61. 
Roem. et Sch. syst. veg. mant. 2. p. 120. 
Habitat in America boreali. 
Radix fibrosa, fibris rofescentibos. Culmus triangularis, 
pellis, basi loliosus. Folia longitudine culmi, 2-3lin. lata. 
Umbella 3-4radiata; radii in radiolos 2-3partiti. Involucri 
pbylla 2-3 umbella multo longiora, scabra; involucella an- 
gustiora. Spiculae fere pollicares, fructiferae subteretes. Val- 
