THE PTERIDOPHYTA OF THE JL'AN FERNANDEZ ISLANDS 1 3 



fere ad basin in vulvas duas ovato-elongatas, brunneas vel nigrescentes, apice 

 distincte et acute dentatas divisis; receptaculo incluso. 



In the higher woods and humid heaths of the highlands, apparently not 

 very rare. (Fertile Feb. — April.) 



Masatierra: Elevated slopes of O. Piedra agujeriada, on fern-trees, 650 m 



(no. 592); C. Centinela, dark humid forests, c. 560 m (no. 1140); the longitud. 

 ridge, above Pangal, on fern trees, c. 800 m; Q. Yillagra, mountain spur W. of 

 El Vunque, c. 500 m (no. 630). 



Masafuera: Woods on the Sanchez plain, 515 m (no. [137); heath of 

 the Correspondencia Camp, in the ravines, 1 100 — 1200 m (nos. 423, 1139); C. 

 del Barril, c. 750 m; Q, del Blindado, in the forest, on ferns, 440 m (no. 397); 

 near the summit of Los Inocentes, c. 1400 m (no. 1138). 



f. lanceolata: minor, lamina lanceolata, 3 — 5 cm longa, raro supra 1 cm 

 lata, alis rachidis vix denticulatis; habitu, magnitudine et pinnis omnibus inae- 

 quilateralibus H. falklandico sat similis, sed differt et cum f. typica congruit 

 soris non stipitatis nee non valvis distincte denticulatis. — Fig. 4 c. 



Masafuera, at the Correspondencia Camp, in the ravine, with the type, 

 1 160 m (no. 1 175). 



This new species is to H. tunbridgense what H. falklandicum is to H. 

 peltatum. It is very variable in size and shape of the lamina, but all forms 

 have the same characteristic brown or dark brown indusia with elongated, 

 toothed valves, similar in outline to those of H. falklandicum, but never stipitate 

 and always dentate (comp. Fig. e and //). The larger, ovate-deltoid fronds 

 recall //. dichotomum, but they are quite plane and the stipe is wingless; the 

 sori are very different, the mature sporangia never exserted. Middle-sized 

 leaves with short, ovate-oblong lamina with all pinnae unequal-sided (Fig. b) 

 can scarcely be distinguished from // tunbridgense when sterile, but leaves with 

 mature sori at once show the difference; true H. tunbridgense never has so 

 elongated valves, which never are brown. There is little doubt of such forms 

 having been referred to H. tunbridgense, a species scarcely occurring in the 

 islands. The f. lanceolata is very similar to H. falklandicum in general habit, 

 but is easily known by its sessile indusia and toothed valves. The collection 

 contains many intermediate forms between the extremes. 



Area of distribution: Endemic. 



12. H. pectinatum Cav. Descr. 275 (1802); Johow 1893: 42, 1896: 170. 



(Fertile, March.) 



Masatierra: REED (IHerb. Kew) without exact locality. 

 Masafuera: In the highest part of the island, under rocks etc. in the 

 alpine heath; the Correspondencia Camp, in the ravine, 1160 m (no. 1 141 ); Las 

 Torres, in wet moss under rocks, rare, 1370 m (no. 476); S. slope of Los Ino- 

 centes, in a fern grove, 950 m, on Dicksonia. and in the heath near the summit, 

 c. 1400 m (no. 378). — New for this island. 



The specimens are very poorly fructiferous; the largest ones have most 

 of the secondary segments deeply cleft, thus somewhat resembling H. secundum. 



