266 PATAGONIAN EXPEDITIONS ; BOTANY. 



H. SULCATA FILICULMIS (Schrad.) Kurtz. 

 N. Patagon., swamps near Carmen. 



8. H. UNIGLUMIS Link. 



Culm from a stoloniferous base, erect, gracilescent, scarcely exceeding 

 30 cm.; sheaths apically ustulate, lacerous. SJ)ike oval, bract single, 

 subrotund, with its base embracing the whole spike. Scales oblong, rather 

 obtuse, fuscescent, with a green keel. Achene 2-edged ; style bifid, with 

 a very thick base, not corrugate. 



(Eur.; N. Amer.); S. Patagon., swamps between S. Julian and Rio 

 Deseado. 



5. STENOPHYLLUS Raf. 



Annual sedges, with slender, erect culms, and basal linear-filiform leaves 

 having hairy sheaths. Spikelets in umbels or heads, or solitary, with a 

 i-3-leaved involucre, and scales oblong, spirally-imbricated. Perianth 

 none. Stamens 2-3. Style 2-3-cleft, its base persisting as a tubercle 

 on the trigonal achene. 



Species 20, in warm and temperate regions. 



S. CAPILLARIS (L. sub Scirpus] Brit. (Gray sub Finibristylis]. 



Culms 15 cm. high and leaves tufted, filiform, shorter than the culms. 

 Spikelets several or only i, often panicled, ovoid-oblong. Stamens 2; 

 styles 3-cleft. Achenes yellow-brown, wrinkled across, larger upwards. 



(N. and trop. Amer., Brit. &. Br. i, 258) ; N. Patagon. 



6. OREOBOLUS R. Br. 



Dwarf cespitose, with distichous leaves and a single i -flowered terminal 

 spikelet (rarely 2 Spikelets) terminating the erect peduncle. Glumes 3. 

 Perianth represented by 6 narrow, rigid, subequal, hypogynous scales, 

 which persist like a pappus. Achene smooth, ovoid, with no rostrum. 



Species 3, in S. Austral., Tasman., N. Zeal., Hawaiian Is., S. Amer. 



i. O. OBTUSANGULUS Gaud. (O. pumilio R. Br.) 



Culm sharply trigonal, covered below ; the leaves linear. Scape axillary, 

 short, compressed, i -flowered. 



