those which grow in tlie State. The Phanerognins fiml Arrogens 

 are pretty nearly lull, the Anopfiytes less so, but no department of 

 the Thallogem, except the Mnrine Abjtz. is probably represented 

 in this list by one-half of those species which belong there ; 

 indeed, the enumeration was so evidently incomplete, that at first 

 it was intended to omit the entire class, except the Marine Algce, 

 and it is now inserted v/ith this explanation, and the hope that 

 micrcscopists may be induced to search out and add the missing 

 species to those herein name.d. 



It may well be said in this connection, that questions of great- 

 est interest, not alone in a merely technical sense, await solution, 

 which may fairly be expected from the study of the life history 

 of the microscopic Algce and allies: that algoid and fungoid vege- 

 tation has much to do with disease in man and beast and higher 

 vegetable organisms, is held as proven; but whether as cause or 

 effect, or only coincident, is not entirely agreed. No greater ques- 

 tions of material value await determination, than the relations 

 between decay of physical life and the growth of microscopic veg- 

 etation. It may be perhaps tliat the study of these relations, by 

 some of our younger botanists shall lead to an elucidation of facts 

 and a determination of truths of unmeasured value to the com- 

 monwealth. 



That family of plants, Protophijta, containing those species 

 always present in ferments, comprising Saccharoniycea, Bacillus, 

 Bacterium, &g., is not here noted ; a lack which some future 

 student must supply. 



All that is claimed for this enumeration is its purpose to help 

 and encourage the beginner; — at the same time it gives, we 

 believe, correct information to the advanced botanist of facts 

 regarding liabitats and distribution of species. Claim to absolute 

 accuracy of determination, in every case, is not made, and it is 

 frankly admitted that corrections, as well as reformations, perhaps 



