PROPERTIES OF CRYPTOGAMIC PLANTS. 45 



Alg^. {GloiocladecB.) 



Rivularia cmgulosa, Roth, j Attached to water-plants in 

 JJlva pruniformis, Linn. I ponds. 



Pallas states, that in Siberia it is used in swellings of the 

 limbs and in diseases of the eye. M. & De L. 



Protococcus nivalis^ Ag. Grev. Crypt. Flo. "] Crimson Pro- 

 Hcematococcus Gremllii. \ tococcus, or red 



Uredo nivalis, Baner. > snow. In North 



Pcdmella nivalis, Hook, in Paris' 2d Yoy. J America. 

 " On calcareous rocks, within the reach of occasional innnda- 

 tion," near Dnblin, W. II. Harvey. 



" This curious little plant, which, under the name of red 

 snow, has excited no inconsiderable interest among the greatest 

 botanists of the age, is usually found in this country under the 

 form of a thin, stain-like stratum on the surface of rocks, or in- 

 vesting decayed vegetable substances with a purple crust. It 

 was brought by Capt. Ross from the Arctic regions, where it was 

 observed covering the surface of the snow, in patches of many 

 miles in extent, and penetrating in some places to the depth of 

 twelve feet." Crypt. Eng. 



Seen by Mr. Agassiz on the glaciers of the AIjds. 



Palmella montana, Ag. Syst. ) 



Ulva " Lightf. [ 3^i^fX '^''' 



Palmella alpicola, Lyngb. Hydroph. Dan. G9. ) ^ ' 

 According to Lightfoot, this is the '•^ Mountain Bulse^^ of the 

 Scotch ; and " the Highlanders wash it and rub it between their 

 hands in water, so as to make a paste, with which they purge 

 their calves." Crypt. Eng. 



NostooTi commune, Yauch. ] ^ . n -i 



m 77 J 7 X • " Common m gravelly soils. 



Iremella nostoc/i, Lmn. ) ° "^ 



This remarkable production, we are told, is a gelatinous mat- 

 ter of a yellowish green color, enveloped in a membrane, traversed 

 by filaments, and springing up suddenly in wet weather. It loses 

 its volume when dried, but may be made to recover it by the re- 

 application of water, resuming also its gelatiform aspect. Tlie 

 alchemists, Mcrat & De Lens inform us, have written reveries 

 without number concerning this singular production. Some 



