DUSEN I THE VEGETATION OF WESTERN PATAGONIA. 25 



The ground is rich enough in Musci, but Hepaticce are scarce. A reg- 

 ular carpeting of mosses, composed of loosely woven species, is not 

 uncommonly to be found in places where, for one cause or other, the 

 Chnsquea grasses are receding. The moss vegetation is likewise rich on 

 the affluents of the main river, especially where they trickle down through 

 stony and well-shaded ground. Of Hepaticce hardly more than two spe- 

 cies, and only in extremely rare cases, occur in considerable numbers; 

 namely, Plagiochila latifrons Hpe. et Gottsche, and Chiloscyphus striatellus, 

 the latter also growing epiphytically on Hymenophyllacece and Pogonatum 

 dendroides. 



In the following list of some of the more important Hepaticce and 

 Musci I have included some species which grow on rocks and stones, 

 denoting them with an appended (r) Hepaticce: Cryptomitrium tenerum 

 (Hook.) Aust, Symphyogyna circinata N. et M. and S. hochstetteri N. et 

 M., Jamesoniella colorata, Tylimanthus fendleri Steph. and T. mridis 

 Mitt., Plagiochila gayana Gottsche, P. longissima and./ 1 , tristis Steph. (r), 

 Lophocolea campanulata Steph. (r), L. gottscheceoides and L. triseriata 

 Steph., Alobiella dusenii Steph. (r), Isotachis anceps (r), Schisma dura 

 Steph. (r), Lepicolea ochroleuca and L. quadrilaciniata (Sull.) (r), Masti- 

 gophora antarctica Steph. (r), Schistochila spegazziniana (Mass.) (r), and 

 Balantiopsis chilensis. 



Musci : Rigodium toxarion and Thamnittm arbusculans, both common 

 and massed together, Brentelia chilensis Lor., occasionally plentiful and 

 forming mats along brooklets ; Brentelia harotiana Besch., B. brachycoma 

 Besch. and B. snbloiigata Broth, sp. nov., Rigodium carnosulum sp. nov. 

 and R. pseudo-tJmidiiim sp. nov., Brachythecium cuspidarioides sp. nov., 

 Bartramia magellanica Aongstr. (r), Bartramidula exigua (Sull.) Jaeg., 

 Dicranum nigricaule and D. billardieri, Hypopterygium didictyon and H. 

 thouinii, Acroschisma ivilsoni Hook. fil. et Wils. (r), Leptotheca spegazzi- 

 niana C. Miill. (r), Rhacomitritim subnigritum sp. nov. and R. flavopalli- 

 dum sp. nov., Bryum steffeni sp. nov., B. bremgemmatum sp. nov. and B. 

 timmicecanlon sp. nov., Leptobryum Pyriforme (Hedw.) Schpr., Etistichia 

 longirostris (Brid.) C. Miill. (r), Hypnodendron krausei, Isothecium serpens 

 sp. K.<3v.,Ditrichtmi conic nm (Mont.) Par., Pogonatum dendroides, Pseudo- 

 leskea fnegiana Besch., Catagoninm politum (Hook. fil. and Wils.) Mitt, 

 Ptychommtcm cygnisetum, Blindia contecta C. Miill. (r) and B. globularis 

 sp. nov. (r), Webera cruda (L.) Schwaegr. and W. alticaulis (C. Miill.) Par., 



