DERIVATION OF THE FLORA AND FAUNA 413 



Polypodiwn L. 



scolopcudria Burm. Palacotrop., wide-spread. 



Polystichinn Roth. 



Fuentesii Espinosa. Belongs to the /'. vistitum assemblage. 

 Mttaria Sm. About 80, pantrop.-siibtrop. 



eloiigata S\v. Indonial.-Polyn. -Austral. 



Ophioglossaceae. 

 Ophioglossiim L. 



lusitiDiicuni L. subsp. conaccuni (Cunn.) Clausen. Boliv. -Chile, Austral., Tasin., 

 X. Caled., X. Zeal. 



reticulatiu)! L. S.E. As., Philipp.. X. Guin., Melan.-Polyn., east to Mangareva; 

 Mascarene Is. 



Psilotaceae. 



Psilotuni S\v. 2 wide-spread sp. 

 nudum (L.) Griseb. Pantrop. 



Fifteen species are listed, 4 of them endemic \2^.6°o), the endemic variety 

 of Asple)iiu))i adiantoides not counted. 



Geographical elements. 



In my earlier subdivision [2^^) the following groups were distinguished. 



1. Australian-Polynesian element (6). 



a) Species found elsewhere: Asplenium adiantoides, Elaphoglossum tahitense, Micro- 

 lepia strigosa, Vittaria elongata, Ophioglossum coriaceum. 



b) Endemic: Doodia paschalis. 



2. Palaeantarctic element (i). 



Found elsewhere: Asplenium obtusatum. 



3. American element (i). 



Endemic: Dryopteris Espinosai. 



4. Wide-spread tropical element (4): Dryopteris gongylodes and parasitica (=dentata), 



Polypodium phymatodes, Ophioglossum reticulatum. 



The list contains 12 species; two have been reported later and some nomen- 

 clatural changes have been made. A new geographical arrangement follows here. 



I. Palaeotropical element. — 11 sp. (73-3%)- 



1. Patitropical (3): Dryopteris gongylodes and dentata, Psilotum nudum. 



2. Palaeotropical (1): Asplenium adiantoides (endemic variety). 



3. Malaysian-Polynesimi (6^. 



a. Endemic: Elaphoglossum Skottsbergii. 



b. Xot endemic: Davallia solida, Microlepia strigosa, Poh'podium scolo- 

 pendria, Vittaria elongata. Ophioglossum reticulatum (also Mascarene Is.). 



4. Australiaii-Polynesian (i). 

 Endemic: Doodia paschalis. 



