—4 



I. //. rugosiiin (Ehrh ) De Not., is not very common, but is found in 

 patches by itself, iind can readily be identified by its secund leaves, with 







Fig. I. H. >-Hgos!iiii X I ; leaves x 5 ; alar cells highly magnified. 



long-pointed and serrate apex, and by the small alar cells, which are quite 

 different from any of the other species. It has acute, spinulose papillae on 

 the back of the leaf. Its favorite habitat seems to be on thin layers of soil 

 on bluff's and ledges, though it is found on grassy banks in woods, and in 

 mountain regions. Adirondack Mts., Bluffs of Lake Champlain, and around 

 the lakes of central New York. 



2. H. iriquctruni (L.) B. & S.. is the coarsest and most bushy of all the 

 Hylocomiums, and is very common. It grows in loose tufts in pine woods 

 on the ground, or on rocks in both very dry and very wet situations. Once 

 known this moss is never overlooked. The leaves are large and spreading 

 with a broad orange-colored insertion, as seen under the microscope. They 

 have a strong double nerve, with stout papillae on the back. 



3. H. pariethiiDH Lindb. {Hypmnn SL-/irt'beri \^\\\(1.), is by Lindberg 

 as well as Limpricht, placed in the genus under consideration, and as it has 

 a very decided likeness to the other species in the held, it is given here. The 

 habit of growth is more slender than the preceding species, the main stems 

 being longer and the branches more pinnate. I'he nerve is very faint when 

 present, and is either lacking or double. The point of distinction under the 

 microscope is a small triangular patch of inflated orange cells at base of the 

 leaf. It is a very common moss, found on rocks, ground and logs in damji 

 •woods. It somewhat resembles Hypiuoii iiispidation in outward appear- 

 ance. 



