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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. luulemic (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- 

 nuiricata, 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, chilocnsis, rectangulata, remotidens, pudetensis, homomalla, neesiana, 

 riparia, S([uarrosa 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 Jaccjuemontii, Herberta runcinata, Lepicolea ochroleuca, Lepidolaena 

 magellanica,Trichocolea verticillata, Schistochila berteroana, Balantiopsis cancellata, 

 chilensis and purj)urata, Radula hastata. microloba and Dusenii, Madotheca chi- 

 lensis and subsfjuarrosa, Frullania hxklonii, chilensis, magellanica and stipatiloba, 

 Brachiolejeunea spruceana, I larpalejeunea oxyota, Strepsilejeunea acuminata, Sipho- 

 nolejeunea nudicalycina, Aphanolcjeunea asperrima, Colura bulbosa. 



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

 laria cruciata, Marchantia polymorpha. 



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



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

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

 data and Xotarisii, Lophocolea rotundifolia, pallidevirens and textilis, Chiloscyphus 

 lobatus, Adelanthus sphaleriis, Schistochila pachyla and splachnophylla, Radula 

 Mittenii, Frullania lobulata, I larpalejeunea setifera. 



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

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

 pholejeunea spinosa, Aphanolcjeunea dia[)hana. 

 h. Not endemic: Lepidozia sejuncta. 



