MACLOSKIE : CYPERACE^E. 265 







less, ovate-acute, 3-7-flowered. Scales ovate-obtuse, concave-carinate, i- 

 nerved, never green nor reaching the apex. Setce 3-6, shorter than the 

 achene. Stamens 3, anthers linear, obtusely appendaged. Style apically 

 3-cleft, its divisions thick. Acliene half as long as the scale, triangular, 

 obovate-elliptical, punctulate. Tubercle conical. 



(Andes) ; S. Patagon, along Rio Sta. Cruz, in swamps. 



4. H. PACHYCARPA DeSV. 



Creeping. Culms filiform, erect, quadrangular, 7-25 cm. high, Spike 

 sublateral, many-flowered, ovate-obtuse with lower scale ovate-acute, 

 bract-like. Scales ovate, subcarinate, lax, i -nerved, black-sanguineous, 

 scarious on margin and top. Style trifid less than half way, its divisions 

 thick. Achene trigonal, thick, lutescent, truncate. Tubercle very large, 

 conical, mostly broader than the achene. 



(Chili) ; a form in S. Patagon. (by O. Nordenskjold). 



5. H. PALUSTRIS R. Br. 



Culm stout, nearly terete, striate, about a meter tall. Spike thicker 

 than the culm, oblong-lanceolate, many-flowered. Scales white-bordered, 

 with green keel. Bristles usually 4, sometimes none. Achenes narro'w- 

 obovate, rostrum flattened. 



(Eurasia; N. Amer., Brit. & Br. i, 251.) Patagon. by Rio Chico and 

 Carren-leofu ; Falklands. 



6. H. STRIATULA DeSV. 



Creeping. Culm erect, flaccid, 7-20 cm. high, filiform, quadrangular, 

 smooth, sheathed at base, leafless. Spike several-flowered, lanceolate, 

 elongate. Scales ovate, concave, obtuse, dorsally green, laterally blood- 

 red, i -nerved, the nerve not to the apex. Setce 3-4. Stamens 3, anthers 

 long, obtusely mucronate. Achene elliptical, costate, transversely stri- 

 ate, pallid, with a small conical tubercle on top. 



(Chili) ; S. Patagon., by Rio Sta. Cruz. 



7. H. SULCATA Nees. 



In the group having the perigynial setce rigid, persisting ; style bifid 

 or trifid ; bulb or stylobase suberose, rugose, persisting, Achene obo- 

 vate, biconvex. Spicule solitary, terminal. 



(New Mexico.) 



