MACLOSKIE: CYPERACE/E. 261 



3. S. CERisiuus Vahl. (including Isolepis magellanica Gaud.). 



Root fibrous ; ciilms numerous, cespitose, 25-40 mm. high, angulate, 

 capillary. Sheaths one third as long, ending in a mucro. Spike solitary, 

 ovate-oblong to linear, obtuse, many-flowered. Scales ovate, the lowest 

 acute, the others obtuse, black-purple with green keel. Setcz none. Achene 

 obovate ("triquetrous," Speg.). 



(E. Hemisphere); Magellan; rather common in Fuegia. 



S. CERNUUS PYGM/EUS (Kunth sub Isolepis}. 



Scales carinate-navicular, broad, obtuse, mucronulate, their sides 

 hyaline-white. Achene subrotund, flat inside. No perianth-bristles. 



S. Patagon., Beagle Channel. (Dusen.) "Has two forms, brevis and 

 elongatiis." (Wiegarht.) 



4- S. DESERTICOLA Phil. 



Creeping, cespitose; culms covered by castaneous sheaths, 25 mm. 

 high, leafless. Leaves rosulate, plane, striate. Spikes 1-3, forming a 

 terminal head. Lower bracts ovate, 5-nerved, apically coriaceous, 

 greenish, equalling the head ; others shorter, narrower, scarious. Setce 

 6, hypogynous, retrorsely hispid. Achene ovate, triquetrous, acuminate, 

 smooth, scarcely half as long as the scale. 



(Desert of Atacama; Mendoza); S. Patagon. by Rio Chico. 



5. S. GLAUCUS Nees. 



Glaucous. Culm triangular, glabrous, leafy below, rough on the angles 

 at the top. Leaves plane, carinate, scabrous on the angles and margin, 

 almost equalling the culm. Involucre 3-4-leaved, longer than the supra- 

 decompound cymiform umbel. Rays very unequal ; raylets apically 

 i-5-ranked, cylindraceously oblong. Scales carinate, oblong, apically 

 recurved-mucronate and ciliolate, fuscescent with a green keel. Achene 

 round-elliptical, attenuate, long-mucronate. Setce 6, retrorsely spinulose. 



(Chili); Patagon., Neuquen, in damp places. 



6. S. JUNCOIDES Willd. (Isolepis junciformis H. B. & K.) 



Culm cespitose, tall, 45 cm., strict, filiform, striate, rigid, glabrous, 

 leafy at base. Leaves setaceous, canaliculate, shorter than the culm. 

 Involucre 3-leaved, shorter than the depauperate 3~5-rayed umbel; the 



