106 CARL SKOTTSBERG 



var. irritans Kukenth. I. c. 



Masatierra, outlet of a small stream near the foot of Co Negro, abundant 

 (fl.-fr. 7 /i 17, no. 231). 



Larger, with light yellowish brown spikes. I dare say this is what Johow 

 1. c. calls H. maculosa, first found by Reed and later by Johow in B. del Padre, 

 where I have sought for it in vain. 



Area of distribution: Subsp. fuscopurpurea is known from South Chile 

 and Masatierra, but H. maculosa is quoted for the Antilles, Brazil and Chile. 



Oreobolus R. Br. 



*I9. O. obtusangulus Gaud. 



Masafuera: Los Inocentes, forming large compact cushions, 1375— 1500 m 

 (fr. M /a 17, no. 384). — An important addition to the magellanic element. 



Area of distribution: Andes of New Granada and Ecuador to Cape Horn; 

 Falkland Islands; Masafuera. 



Cladium P. Br. 



20. C. scirpoideum (Steud.) Benth. et Hook. f. — Johow, Estud. 143. 



Masatierra: Streams, waterfalls and other moist places in the forest belt, 

 not at all so rare as indicated by JOHOW, but found in many places in the 

 central parts of the island. — El Pangal, by the waterfall, c. 200 m (fl. 1 /i 17, 

 no. 224; also Johow); north-east precipice of Co Damajuana, 500 — 550 m; the 

 gap between Damajuana and Yunque, abundant on wet rocks, c. 600 m (fl. 

 18 /i2 16, no. 163); Plazoleta del Yunque (Johow); Portezuelo de Vilagra, one 

 specimen just behind the Selkirk tablet, with Gunnera bracteata (past. fl. 81 /i 17, 

 no - 359); C. Salsipuedes, edge of the forest, rare, 630 m (past fl. 8 /i2 16, no. 72); 

 Pto Ingles, central ridge, c. 470 m; Q. Juanango, at the brook, 215 m (fl.-past 

 fl. 9 /i 17, no. 602); Q. Villagra, wet rocks in the stream, 240 m, 160 m; Q. de la 

 Choza, wet rock in the forest, c. 400 m. 



According to KtJKENTHAL, in letter to the writer, this species is nearest 

 related to C. angustifolium (Gaud.) Benth. et Hook. f. from Hawaii and Tahiti. 



Area of distribution: Endemic in Masatierra. 



Uncinia Pers. 



*2i. U. brevicaulis Thouars. 



Masafuera: Alpine fell -fields in the northern half of the highland; the 

 Correspondencia Camp, 1130 m ( 5 j 3 17, no. 269 b), and a few hundred m north 

 of this place ( 2B /2 17, no. 369 c); Las Torres, on rocks, 1370 m ( M /2 17, no. 

 369). Everywhere with unripe achenes. — Another addition to the magellanic 

 element. 



