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C. SKOTTSBERG 



fuera; of these 20 (25 %) and 14 (16.5 %), respectively, belong to the endemic 

 element; 34 species are restricted to Masatierra (27.4 %), 44 to Masafuera (35.5 %) 

 and 46 (37.1 %) shared by the two islands. The corresponding figures for the 

 endemic species are: Masatierra 11 (44%), Masafuera 5 (20%), both islands 9 

 (36 %), and for the non-endemics 23 (23.2 %), 39 (39.4 %) and 37 (37.4 %). Of the 99 

 species also found elsewhere Masatierra has 60 and Masafuera '/6. This island is 

 richer in non-endemic species, many of which belong to higher altitudes. 



Geographical elements. 

 I. Andine-Chilean element. — 97 (78.3 %). 



a. Endemic (20): Riccardia adglutinata and leptostachya, Metzgeria multifor- 

 mis, Solenostoma obtusiflorum and rostratum, Plagiochila fuscobrunnea, Tylunan- 

 thus silvaticus, bilobatus and densiretis, Lophocolea papulosa, angulata and sub- 

 muricata, Lepidozia fragillima and disticha, Schistochila Skottsbergii, Balantiopsis 

 hians and lancifolia, Strepsilejeunea squarrosula and macroloba, Lejeunea reticulata. 



b. Also known from Chile and not restricted to the extreme south (73): Mar- 

 chantia berteroana and foliacea, Riccardia fuegiensis, variabilis and nudimitra, 

 Metzgeria decrescens, decipiens and violacea, Hymenophytum flabellatum, Sym- 

 phyogyna circinata and hymenophyllum, Monoclea Forsteri, Androcryphaea con- 

 fluens, Solenostoma crassulum, Jamesoniella colorata and grandiflora, Anastrophyl- 

 lum leucocephalum, Anastrepta bifida, Plagiochila gayana, fasciata, hyadesiana, 

 deformifolia, chiloensis, rectangulata, remotidens, pudetensis, homomalla, neesiana, 

 riparia, squarrosa and robusta, Tylunanthus limbatus, Mylia repens, fuscovirens 

 and ligulata, Lophocolea fernandeziana, attenuata, divergenticiliata, chilensis and 

 muricata,Chiloscyphusintegrifolius,Saccogynasquarristipula,Marsupidiumpiliferum, 

 Bazzaniacerinaand peruviana, Lepidozia bicuspidata,pseudozoopsis,fernandeziensis, 

 plumulosa and Jacquemontii, Herberta runcinata, Lepicolea ochroleuca, Lepidolaena 

 magellanica, Trichocolea verticillata, Schistochila berteroana, Balantiopsis cancellata, 

 chilensis and purpurata, Radula hastata. microloba and Dusenii, Madotheca chi- 

 lensis and subsquarrosa, Frullania Ecklonii, chilensis, magellanica and stipatiloba, 

 Brachiolejeunea spruceana, Harpalejeunea oxyota, Strepsilejeunea acuminata, Sipho- 

 nolejeunea nudicalycina, Aphanolejeunea asperrima, Colura bulbosa. 



c. Cosmopolitan (4): Plagiochasma rupestre, Reboulia hemisphaerica, Lunu- 

 laria cruciata, Marchantia polymorpha. 



II. Subantarctic-Magellanian element. — 18 (14.5 %). 

 All non-endemic: Riccardia breviramosa, Symphyogyna Hochstetterf, Mega- 

 ceros fuegiensis, Jamesoniella maluina and oenops, Acrobolbus excisus, Plagiochila 

 elata and Notarisii, Lophocolea rotundifolia, pallidevirens and textilis, Chiloscyphus 

 lobatus, Adelanthus sphalerus, Schistochila pachyla and splachnophylla, Radula 

 Mittenii, Frullania lobulata, Harpalejeunea setifera. 



III. Neotropical element. — 5 (4.0 %). 



a. Endemic (4): Fossombronia fernandeziensis, Anthoceros Skottsbergii, Lo- 

 pholejeunea spinosa, Aphanolejeunea diaphana. 



b. Not endemic: Lepidozia sejuncta. 



