DUSEN I THE VEGETATION OF WESTERN PATAGONIA. 



The flora of the steppe-like slopes above is partly composed of the 

 same species as I have already stated to occur in the small steppes of the 

 valley. But as, in addition, it shows many species which I did not find 

 in the latter, I subjoin a complete list of species. It is as follows : 



Baccharis magellanica (Lam.) Pers. 

 Chiliotrichium diffusum (Forst). 

 Pernettya mucronata (Linn, fil.) Gaud. 

 Escallonia rubra Pers. 

 Senecio argenteus Kze. 



chilensis Less. 



andersoni Hook. fil. 

 Erigeron sordidus Gill. 

 Hypochceris poeppigii (DC.). 



arenaria Gaud. 

 Perezia linearis Less. 

 Gnaphalium serpyllifolium Remy. 

 Hieracium chilense Less. 

 Saxifraga cordillerarum Presl. var. magellanica 



(Poir). 



Mulinum spinosum (Pers.). 

 Daucus australis Poepp. 

 Anemone multifida Poir. 

 Ac&na multifida Hook. fil. 



elegans Phil. 



Fragaria chilensis (L.) Ehrh. 

 Empetrum rubrum Vahl. 

 Melandrium magellanicum (Lam.) Fenzl. 



Oxalis laciniata Cav. 



Viola maculata Cav. 



Discaria discolor (Hook.). 



Rhacoma disticha (Hook.) fil. 



Berberis microphylla Forst 



Wendtia reynoldsi Endl. 



Armeria chilensis Boiss. var. magellanica Boiss. 



Cerastium arvense L. 



Lathyrus magellanicus Lam. 



Phacelia circinata Jacq. 



Calceolaria biflora Lam. 



Valeriana carnosa Sm. 



Loasa -volubilis Juss. 



Thlaspi magellanicum Comm. 



Sisyrinchium chilense Hook. 



Luzula racemosa Desv. 



Phleum alpinum L. 



Trisetum subspicatum Beauv. 



Poafuegiana (Hook, fil.) Hack. 



Deschampsia flexuosa (L.) Trin. 



Festuca gracillima Hook. fil. 



Aira montividensis Spr. var. submutica Doell. 



Cortaderia pilosa (d'Urv.). 



In some places these steppe-like slopes are studded with small groves, 

 consisting exclusively of Nothofagus pumilio, N. antarctica having now 

 disappeared. The ground beneath is sometimes fairly well covered with 

 mosses, the following species of which are conspicuous : Brachythecium 

 paradoxum (Hook. fil. et Wils.) Besch., B. morenoi C. Mull., Bryum 

 hamatum sp nov., Acrocladium auriculatum (Mon.) Mitt., CampyfopHS 

 laniger Besch., Plagiothecium lepto-phimosum Dusen and Catagonium poli- 

 tum (Hook. fil. et Wils.) E. Mull. 



Even at an altitude of 800 to 900 meters Nothofagus pumilio is only a 

 low tree, the lower branches of which do not permit one to pass beneath 

 them. The greater the altitude at which it is found, the shorter it is, 

 forming at the upper limit of its range (1300 meters above sea-level) a 

 very stunted forest of dwarfed trees, the horizontal branches of which are 



