3ti KKVUE BRYOLOGJQUE. 



llie two compared counlrles are, indeed, greater than whal 

 was lo be aforehaad supposed, a fact which is to be ex- 

 plained by the dill'erent distribution of bryological stations 



in both countries. 

 Among the four principal bryological stations (earth, 



\Yater, trees and rocks), the first is by far the most predo- 

 minant station bv the Jenisei and also the one that produces 

 the greatest variety of species. If you ascend from the river, 

 you vill at first tread on a border of almost naked earth, 

 which is in every year exposed lo inundations. At the Je- 

 nisei some mosses seem to thrive only in ihis border, as for 



- instance PhysfX>mitrella patens, Physcomllnum piriforme, 

 Weisia viridiila and two species of Riccla, ail of which, how- 

 ever, are rare with exception of the last-mentioned ones. The 



. two species of Riccia, on the contrary, were found, often in 

 huge masses, along the river from Jeniseisk, extending at 

 least to 70" 30' n. lat. It is not before known, as I unders- 

 tand, that this genus extends so far tp the north or even into 

 the arctic region. Beside the above-mentioned mosses you 

 may in the same locality find Marchantia pohjmorpha, Dicra- 

 mlla raria, Funaria hygrometrica and Bryurn argenteum. As- 

 cending a little, but still being within the reach of the 

 inundations, you will meet Ceratodon purpitreus, Leptohryim 

 piriforme, Fissidens incurvus, Didymodon ruhellus (more 

 - sparingly), and in more northerly regions Tortnla breviros- 

 triSj Dkranella rufescenSj Discelium nudum, Webera palchcUa , 

 annotina, and some species of Bryum, among which some 

 pi-obablvare novelties to the science. Ascending still highter 

 to the parts of the hanks that usually are not exposed to 

 inundations, you will see the earth ornamented with We- 

 hem nutans andcruda, Pogonatum urmgerum, Trichodon cy- 

 Undricus, Torlula subnla'ta, Preisia commutala and some 

 other Marchanuaceae. Only to more soutliem regions belong 

 Tortnla convolulo, Leptotncfnim tortile j^ and Catharineaun- 

 dulala; whereas Buxbaumia aphylla, Btasia pusilla, Dicra' 

 nella cerviculata, crispa and subulata, Oligotrichum laein- 

 galam, Pottia latifolia with ^ pilifera, Mceaia uliginosa, Bar- 

 tramia ityphylla, Conostomum borcale, Encahjpta rhabdocarpa 

 and Pogonatum capiliare are almost all limited to the arctic 

 region or even to the tundra region. On moister soil we 

 found all along the river Wehera albicans and a species of 

 P cilia. 



In places where mosses have had time to form a more 

 coherent carpet over the earth, this carpet consists of diffe- 

 rent species according to different localities. In drier si- 

 tuations in woods and in the tandra, the ground is carpeted 

 with Ihjlocomium spl end ens and Iriquetrum^ Hypnum Schn- 

 heri and Crista fastrensis. Pnlytrichum. jvniperinum . Pi Hid i am 



