TRIANCrIA MONOGYNIA. 275 
C. phymatodes MKWenTjg. descr. ub. p. 23. Linfc Jalirb. 
1. 3. |i. 87. Room. et Sci), syst. TCg. niont. 2. p. 117. 
Toirey Fl. of the Unit. Sfat. 1. p. 62. 
C. repens Elliolf. Eot. oF Carol. and Geor^. 1. p. 68. 
Koem. et Scb. syst. veg. mant. 2. p. 112. Spreng. syst. 
veg. 1. p. 224. 
C. tuberosus Pursii. amer. 1. p. 52, Elliott Bot. of Carol. 
and Georg. 1. p. 68. 
Habilat. in America boreali 7\.. 
Eadix stolojiifera, fibrosa, tuberibus pendulis subglobosis 
zonatis. Culmi 1-1.^ ped. alti, erecti, striati, glabri, angulis 
obfii.si.'?. lateribus concavi.*?. Folia fere radicalia, linearia, acu- 
minata, canaliculata, carinata, magis miunsve recurvata, mar- 
niiie laevissima. Involucri phylla 2-3 longissima, margine 
scabriuscnla ; phylla caetera, si adsint, umbella multo bre- 
riorSi Umbella 4-5 radiata, radii compressi, inaequales, o- 
chrea bifida ad basin instructi. Spioae plerumque simplices cum 
spiculis alternis et oppositis, rarius pedunculo uno alterove 
oligostachyo. Spicnlae elongatae, 10-15 florae, basi bractea 
lineari sutfultae. Valvae carinatae, dorso striato viridi, late- 
ribus ilavicantibus, marginibus pallidioribus. Nux brunuea. 
177. Cyperus tetragonus. 
C. spicis oblongis cylindricis; spiculis subtetragonis pau- 
cilloris, invoiiicro longissimo, involucellis nullis. 
C. tetragonus Elliott Bot. of Carol. and Georg. 1. p. 71. 
Roem. et Scli. .syst. veg. mant. 2. p. 130. Spreng. syst. 
veg. 1. p. '224. 
Habitat in Georgia. 
Culmus 2-3 ped. altus, nudus, angulis infra umbellam 
scabriusculis. Folia 12-18 poli, longa, 3 lin. lata, canalicu- 
lata, margine nervoque medio serrulata. Umbella paucira- 
diata, racemi terminales, pollicai-es, unica sessili in centro 
umbellae. Spicnlae 3-5 florae, rachis tetragona. Valvae 
Compressae, nervosae, mucronulatae. Stamina 3. Stylus bi- 
fidus. Nux oblonga triangularis. (Elliott.) 
178. Cyperus tetrastacJiyus. 
C. culmo triquetro, foliis culmo breviojibus margine ca- 
riiiaque .serrulato- scabris, involucro 3-4 pbyllo um- 
bellam subaequaute, umbella .snbqnadriradiata, spiculis 
4-8 linearibus longi.ssimis approximatis, valvis oblon- 
gis obtusis, stylo tnpartito, nuce trigona utrinque atte- 
nuata laevi. 
C. tetrastacliyns Desfont. atl. 1. p. 44. t- 8. Vahl Enum. 
2. p. 343. Roem. ct Scb. syst. veg. 2. p. 197. Spreng. 
syst. veg. 1. p. 224. Link Horl. ber. 1. p. 314. 
Habitat in Algiria Tg. 
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