i. The Pteridophyta of the Juan Fernandez Islands. 



By 

 CARL CHRISTENSEN and CARL SKOTTSBERG. 



With 7 text figures and 5 plates. 



This paper is based on material collected by the undersigned, assisted by 

 Mrs. SKOTTSBERG, 1916 — 17. The study of the collection was begun in Sant- 

 iago, where, thanks to the kindness of Mr. F. FuENTES, I had ample oppor- 

 tunity to see the important herbaria in the Museo Nacional and also, with the 

 kind permission of Professor F. JOHOW, could study his herbarium in the In- 

 stituto Pedagojico. In order to solve some important questions and to classify 

 some species which remained doubtful, I asked the prominent pteridologist, Dr. 

 C. CHRISTENSEN, for assistance, and he willingly offered himself to make a 

 thorough study of the entire collection. I have the great pleasure herewith to 

 thank him for all the trouble he has taken in preparing the descriptions of the 

 new species, in adding numerous critical notes on the systematic position and 

 affinity and in making the fine and very exact drawings. 



The localities in Masatierra are enumerated from E to W along the north 

 and south sides of the island, respectively; for Masafuera, the localities are 

 enumerated from N to S along the east coast and then round to the west 

 coast, followed by the observations made in the high mountain region. The 

 Spanish names are used, with the following abbrevations: B. = Bahia, bay; 

 C. = Cordon, mountain ridge; Co = Cerro, mountain; Pta = Punta, cape; 

 Pto = Puerto, cove; Q. = Quebrada, valley with steep sides, gorge, canyon; 

 V. = Valle, valley. — Maps will accompany Vol. I. 



Unless otherwise stated, all species have been observed by myself in all 

 the places quoted. The numbers in brackets refer to our collection, of which 

 specimens are kept in Stockholm (Riksmuseum), Gothenburg, Upsala etc., and 

 in several foreign herbaria. 



A ! after the name of a collector signifies that I have seen the original 

 specimen. 



An * before a latin name indicates a new addition to the flora of the 

 group; if put before the name of one of the islands, it sgnifies that the species 

 was found for the first time in the island in question. 



The altitudes are in meters above sea level. 

 I — 20206. The Nat. Hist, of Juan Fernandez and Easter Isl. .Vol. II. 



