CYPEBU8 AND KYLLINGIA. 169 



gluniis inequalihiis, mciubraiiaceis, acutis, carinis albidis, 

 glabris: seniiiie ovale, compresso. Floribus trkmdris. Pis- 

 till urn bijidum. 



Root creeping, perennial. Cidm 3 — 10 inches high. Leaves 

 1 — .i, much shorter than the cuhn, and entirely smooth. 

 Shmths closed. Two or tliree acute pointed sheaths, inde- 

 pendent of the leaves, are frequently found at the base of 

 the culm. Leaves of the invulucre generally vertical, with 

 a few scattering spines on the margin. Heads very small, 

 and always solitary. 



Inhabits damp close soils on the shores of the Rio dc la 

 Plata, in the vicinity of Buenos Ayres. Flowers, February — 

 April. 



KijUingia rigida. 



Culmo triquetro : foliis linearibus, brevissimis, abrupte 

 acutis: involucro triphyllo, brevi, acuto : capitulo ovato, ob- 

 tuso : glumis inequalibus, membranaceis, obtusis, carinis vi- 

 ridibus, glabris : semine oblongo, subtriquelro. PistiUum 

 bifidum. Planta rigida. 



Root creeping, perennial. Cidni 4 — 15 inches high. 

 Leaves very short, and rarely more than one exclusive of the 

 sheaths, of which there are two or three at the base of the 

 culm, closed, and acute. Leaves of the involucre generally 

 ex|)anded, and sometimes sliorter than tlie head. Head ge- 

 nerally ovate, but varies from globose to cylindrical. The 

 flowers appear to l)e diandrous. 



Inbaliits low moist situations near Rio de Janeiro, and also 

 near Mahlenado, on the Rio de la Plata, in the Banda Orien- 

 tal. Flowers, January — .iprii 



Observation. 

 This plant appears to be allied to ihe K. brevi/olia of Rottboll, but differs in 

 the culm. Vide If'illd. Sp. pi. v. 1, p. 256. 



VOL. II.- 



