234 <^- SKOTTSBERG 



various geographical elements of which the flora is made up: many of the non- 

 endemic species have a more or less wide distribution, and the accurate systematic 

 position of the endemic ones is, in many cases, uncertain or quite unknown; where 

 no information was given by their author and nobody has studied them after him, 

 I have not ventured to find a place for them. Thus 1 1 species had to be left out, 

 bringing the number down to 120, on which the percentages have been calculated. 

 Even so it stands to reason that the arrangement below cannot be definite because 

 many doubtful points remain to be cleared by the bryologist. 



As to the 83 non-endemic species the main thing is whether, regardless of 

 their total distribution, they have been found in S. America or not; in consequence 

 of the geographical position of Juan Fernandez they must be referred to one of 

 the American groups I-III. No less than 25 % are austral or subantarctic and 

 bicentric; their origin, if antarctic or not, will not concern us here. 



The geographical elements. 

 I. Andine-Chilean element. — 77 (64.2%). 



a. Endemic species (15): Dicranoloma fernandezianum and capillifolioides, Fissi- 

 dens pycnotylus, Didymodon calymperidictyon and linearis, Ulota fernandeziana, 

 Philonotis glabrata, Ptychomnium falcatulum, Distichophyllum fernandezianum, 

 Pterygophyllum tenuinerve, Eriopus leptoloma and grandiretis, Thuidium Masa- 

 fuerae, Rhaphidostegium aberrans, Rigodium robustum. 



b. Also known from Chile, rarely extending to the extreme south (57): 

 Pleuridium Robinsonii, Ditrichum affine andlongisetum.Hymenostomumkunzeanum, 

 Amphidium cyathicarpum, Dicranoloma capillifolium, Menziesii and nigricaule, 

 Campylopus truncatus, Thysanomitrium Richardi and leptodus, Eucamptodon 

 perichaetialis, Fissidens rigidulus, leptochaete, maschalanthus and asplenioides, 

 Tortula scabrinervis and flagellaris, Rhacomitrium loriforme and convolutum, Zygodon 

 intermedins and Menziesii, Stenomitrium pentastichum. Macromitrium hymeno- 

 stomum, Bryum Lechleri, Leptostomum Menziesii, EustichiaPoeppigii,Rhizogonium 

 mnioides, Bartramia aristata, Philonotis krauseana and vagans, Rhacocarpus Hum- 

 boldtii, Dendrocryphaea cuspidata, Lepyrodon parvulus and implexus, Ptychomnium 

 subaciculare and ptychocarpum, Weymouthia mollis, Leptodon Smithii, Porotham- 

 nium arbusculans, Lamprophyllum splendidissimum, Lopidium concinnum, Hypo- 

 pterygium Thouini, Rhacopilum fernandezianum, Thuidium Valdiviae, Sciaromium 

 pachyloma, Stereodon Lechleri, Rigodium toxarium, arborescens, hylocomioides 

 and tamarix, Rhynchostegium complanum and tenuifolium, Catagoniopsis berte- 

 roana, Hypnodendron microstictum, Oligotrichum canaliculatum, Dendroligotrichum 

 dendroides. 



c. Cosmopolitan (5): Ceratodon purpureus, Gymnostomum calcareum, Cam- 

 pylopus introflexus, Rhacomitrium lanuginosum, Funaria hygrometrica. 



II. Subantarctic-Magellanian element. — 13 (10.8%). 

 All non-endemic, found in the far south, many going north to the latitude 

 of Valdivia or even farther; several occur on the P^alkland Is., South Georgia or 

 other subantarctic islands, and not few reappear in New Zealand, etc. 



