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Demarara, and another in the island of St.Vincent's. 

 I have more mosses too, which I think you might 

 like to have. I wish I could consult you about Or- 

 chidece : some fine specimens every now and then 

 flower in our garden ; but according to the present 

 characters every new species forms a new gemis. I 

 am glad you think favourably of my Exotic Flora. 

 I have now by me some rare and interesting sub- 

 jects ; such as the Marcgravia umbellata, Cassytha 

 filiformis, Cytinus hypocistus, and some remark- 

 able Orchidea, besides two neviTiUajidsice. I have had 

 two plates engraved of the Nutmeg, and am about 

 to figure the Artocarpus incisa and bitegrifolia, from 

 very fine drawings made in the West Indies, aided 

 by specimens in spirits. 



I have been lately much engaged with exotic 

 plants. I wish you would look at an original spe- 

 cimen of Lepraria iolithos, and see if it be not the 

 same as the red snow of the arctic people. I have 

 some from Captain Parry, and I have the same plant 

 from Captain Carmichael, found in Argyleshire ; 

 but it does not lose its deep red colour by keeping, 

 nor give out an agreeable odour. I have some rea- 

 son to think that it is only that filamentous plant 

 (young Conferva anrea?) which turns pale by keep- 

 ing, and smells like violets, and which has perhaps 

 by Linnaeus himself been confounded with the gra- 

 nulated kind. Agardh assures me the red snow is 

 common in Sweden. 



We may now expect great things from the hi- 

 therto unexplored parts of North America. I have 

 been the means of sending out two very zealous 



