198 CONTRIBUTIONS 
Rhizoma oblique adscendens, ramosum, radices fibrosas firmas emittet. Culmi basi 
plurifoliati, subinerassati, fusci, 30-80 cm. alti, tenues, compressi, versus apicem 
triangulares, glabri, læves, striati vel sulcati. Folia basi vaginantia culmo breviora vel 
subæquantia, herbacea vel rigidula, linearia, angusta, subulato-attenuata, marginibus 
sæpius recurvatis glabra. Involucrum umbellæ simplicis, e spiculis plurimis sessilibus 
compositæ, triphyllum, phyllis folio similibus, infimis longissimis. Spiculæ in capitulo 
unico confertæ, sessiles, oblangæ vel lanceolatæ, ad 2 cm. longæ, compressæ, 10-12 
floræ, bracteis involueralibus gradatim brevioribus ad basin munitæ. Squamæ navi- 
culares, obsolete carinatæ et lateribus obsoletissime sulcatæ, obovatæ, acuminatæ, 
obtusatæ vel submucronatæ, basis dorso forte depresso-concavis, cinerascentes, mar- 
ginibus pallidis, earina viridula læves. Caryopsis ‘/, squamæ brevior, subpedicellata, 
subapiculata, triangularis, angulis obtusis, subellipsoidea, fusco-brunnea, transverse 
punetatulo-margaritacea, nitida, suacum squama decidua. Stylus trifidus, stigmatibus 
rufis, vix exsertis. Filamentum unieum caryopsin superans. Racheola latiscula, foveis 
marginatis. 
Tabula XXXVI B: 5, facies; 6, spicula; 7, squamæ duæ; 8, pistillum cum 
squama comparatum; 9, caryopsis; 10, filamentum ac anthera. 
C. robusti Kunth, €. vegeti Willd., proximus ab omnibus maxime tamen diversus ; 
C. ochraceo Vahl. arcte affinis sed valde distinctus plurimis caracteris : culmis graci- 
lioribus, foliis phyllisque 3-5 angustis, umbella, squamis basi concavis, caryopsi, pyri- 
forme. 
Assomption, in sepibus, Maio, n. 404 et in decliviis ad flumen Paraguay, Apr., 
n. 404%, Caaguazu, in campis, Nov., n. 4042. 
Ad Monte de Tareiry, dep. San-Tome, prov. Corrientes, G. Niederlein, n. 2184! 
C. Haspan L., Sp. PI, p. 66; Nees ab Esenb., L. c., p. 25; Kunth. L. c., p. 34; 
Bôckeler, L. c., XXXV, p. 574; C. B. Clarke, L. c., p. 119. 
Caaguazu, in pratis paludosis, Nov. n. 406; in ripis fluminis Ro-lejui, versus 
urbis Caaguazu septentrionale partem, Nov., n. 676; Villa-Rica, in campis humidis, 
Dec., n. 409; in valle Y-acan-quazu, propre Valenzuela, in pratis paludosis, Mart., 
n. 4516. 
In Cordillera de Misiones, G. Niederlein, n. 2155. 
Area geog. America calidior, Africa tropicalis occidentalis, Asia meridionalis et 
occidentalis. 
C. CHaLARANTAUS Presl, Rel. Haenk., I, p. 177, t. 32, f. 1; Kunth, L c., p. 28; 
Bôckeler, £. c., XXXV, p. 534, synon. C. umbrosus Nees ab Esenb. exclus. 
