Svensk Botanisk Tidskrift. 1922. Bd. IG, H. !.♦ 



ON A COLLECTION OF PTERIDOPHYTA FROM 

 CELEBES LEG. DR. W. KAUDERN. 



BY 



CARL CHRISTENSEN. 



From Dr. Selim Bihgkh, Stockholm, I have rcceived for deter- 

 mination a collection of Pteridophyta, gathered hy Dr. W. Kaudern 

 diiring his travels in Northern, Central- and Easl-Celehes 1917 — 

 1920. The collection is proportionally poor in species, in all 88, 

 hut it contains several very interesting and new species so I find 

 it justified to puhlish this account. 



The most comprehensive contributions to our knowledge of thc 

 fern flora of Celehes were given by Dr. H. Christ, who in two pa- 

 pers (Ann. Jard. Biiit. vol. 15, 1897, and II. vol. 4, 1904) has pub- 

 li.shed his determinations of the very rich collections brought 

 home by the cousins Sarasin. In these papers Christ described a 

 considerable number of new species; it is curious that Dr. Kau- 

 dern has found none of them, the highly interesting Nephrolepis 

 dicksonioides (>hrist only excepted; it means perhaps that many fern- 

 species are very local in distribution. On the other hand Dr. 

 Kaudern has discovered some few species in Gelebes which were 

 known before from other INIalayan or Papuan Islands, and a re- 

 markable find is that of Pteris dactijlina Hook., a species pre- 

 viously only known from Himalaya; besides he has detected five 

 species which I believe to be undescribed. I give below the full 

 description of these new species together with a few remarks on 

 some interesting ones. 



Almost all species collected are large earth-ferns or species grow- 

 ing epiphytically on stems of trees. The collection lacks nearly 

 lolally samplcs of thc numerous small Polypodia and of Hymeno- 

 pliyllaceae. which commonly grow in the crowns of tall trees and 



