28 CARL CHRISTENSEN AND CARL SKOTTSBERG 



on one side fertile, and sterile on the other, corresponding to B. procerum 

 figured by Labillardiere, Nov. Holl. PI. Spec. tab. 247. 



Area of distribution: Central Chile to West Patagonia, Falkland Islands; 

 Juan Fernandez. 



32. B. cycadifolium (Colla) Sturm, Enum. pi. cr. vase. chil. 23 (1858); 

 C. Chr. Ind. 152. -- Syn. Ldmaria cycddifolta Colla 1836: 43 tab. 71; Johow 

 1896: 158; L. lanuginosa Kze Anal. 19 (1837), Gay 6: 479; L. Boryana Hemsl. 

 72; Johow 1893: 27 f. 10; B. magellanicum var. cycadifolia C. Chr. Arkiv for 

 Bot. 10: 9 (1910). 



Plate 4. 



Fertile in March — April. 



Masatierra: Characteristic of all the high ridges in the eastern and 

 central parts, forming very dense growths above 4— 500 m (no. 580) and reach- 

 ing the summit of El Yunque (940 m) where stout specimens may be seen 

 with field glasses. In the dense forest it is scarce, but on open, drier mountain 

 ridges with scattered trees it is again common. It is also encountered in the 

 treeless basal region, from Pto Frances to Pto Ingles, descending to 30 m 

 above sea level. On the south side of the island, small specimens were found 

 as far west as in B. Chupones. 



Masafuera: On the ridges, in the alpine heath etc., smaller than in Masa- 

 tierra buth otherwise typical; O. del Mono, one small plant at the roadside; 

 C. del Barril, 700-1200 m; alpine heath near the Correspondencia Camp, 1130 

 — 1350 m (no. 405); Western precipice of C. Atravesado, well developed; slopes 

 of Los Inocentes, scattered in the Dicksonia-be\t, important in the typical alpine 

 heath 1350 — 1450 m. 



This, the »Cycas-fern», is certainly closely related to B. magellanicum 

 (Desv.) Mett., to which it has been referred as a variety. From examination 

 of dried material alone it is difficult to find good distinctive characters, but 

 collectors apologize for its validity as a species (see Johow 1. c). It is a true 

 tree-fern with a stout, often slightly curved stem and very rigid, shining leaves. 



Area of distribution: Endemic. 



33. B. longieauda C. Chr. Arkiv for Bot. 10: 10 tab. 1 (1910). — Syn. 

 Lomaria sp.?, Johow in sched. herb!; Asplenium longissimum, Johow 1893: 33, 

 1896: 163, non Bl. 



Fig. 5. — Plate 5. 



In the quebradas, on stony or rocky soil, along running water, at the 

 waterfalls etc., often pending from the rocks and forming fine carpets on the 

 walls of the canyons. Not uncommon. Almost ripe fertile fronds were gathered 

 in February. 



Masafuera: de las Chozas, 450-500 m, dry bed of a stream (no. 

 3^5); Q- del Mono, 570 m; 0. de las Casas, in the canyon, luxuriant (no. 420); 

 Q. del Blindado, 440 m, in the bottom of a wooded ravine; 0. Angosta, 1 km 

 from the entrance, at the waterfall; Q. del Varadero, at the waterfall: O. Lo- 

 berfa, waterfall in the gorge, 190 m. 



