1 6 PATAGONIAN EXPEDITIONS I BOTANY. 



representatives being Rigodium toxarion (Schwaegr.) Schimp., Hypnoden- 

 dron krausei,Thamnium arbiisculans and Monoclea forsteri (Hook.). 



From what has just been said, it will appear that the forest vegetation 

 of the Guaitecas Islands is very different from that of the southern sections 

 of our district, being in fact distinctly allied to that of Chiloe and southern 

 Chili. Certain portions of the Guaitecas, however, have a vegetation, in 

 which the southern Patagonian and Fuegian elements prevail, while the 

 south Chilian forms are altogether wanting, or very poorly represented. 

 Such is the case with the vegetation of the peat-bogs and also of the 

 higher and treeless portions of the islands. 



Peat Bogs. 



In western Patagonia peat-bogs are rather uncommon and in our terri- 

 tory I know of such only in the Guaitecas. These bogs have exactly the 

 same appearance as those of the north of Europe. The great bulk of 

 their vegetation consists of Sphagnacecz, belonging to the same species as 

 those of the bogs of southern Sweden. The phanerogamic bog-vegeta- 

 tion of two districts so widely distant from each other, so far as their sev- 

 eral species are concerned, has very little in common, but, in some cases, 

 quite evidently shows a morphological correspondence. 



The bed of Sphagnum is not altogether continuous, but is broken in 

 spots by solid patches of phanerogamic plants ; namely, Donatia fascicu- 

 laris, Astelia pumila, Gaimardia aiistralis, and Oreobolns obtiisangnlus, all 

 of which I have already stated to belong to the southern sections of our 

 district and which also enter into the Fuegian flora. Even Musci, such as 

 Dicranum australe, and D. billardieri, Campylopus flavo-nigritus, sp. nov., 

 and Rhacomitriwn lanuginosum, occasionally break the continuity of the 

 masses of Sphagmim. Species of Hepaticce occur along with them, as 

 Schisma chilensis, Lepicolea ochroleuca, Diplophyllum densifolium and 

 Lepidozia saddlensis, but their assistance in producing the peat is very 

 limited. A couple of lichens, Cladonia pycnoclada (Pers.) and a species 

 of Pseudocyphellaria likewise belong to the bog-vegetation. 



Besides the phanerogamic plants above enumerated, several others 

 should also be mentioned. Schcznodon chilensis Gay. occasionally occurs 

 in groups, but, on the other hand, I did not see Scirpns riparius Presl., 

 though it may have grown here once. I noticed it, together with Sc/ice- 

 nodon, growing in profusion by a lagoon, by the shore of which Sphagna- 



