c m ) 
The mechanifm of the fructification of the 
moffes, and that of the ferns, is truly admir- 
able. Both feem intended for the formation, 
protection, and difperfion, of their feeds, or 
of fome fubftance equivalent to it ; but, un- 
lefs we credit the plates of Hedwig, we are 
equally ignorant of the manner in which 
this feed is produced in both tribes. In the 
magnified leaf of the bry'um undulatum the 
circumftance may be feen which has given 
it's ipecific name, the leaf being waved at the 
edge. This mofs produces it's fructification 
from November to February, and is com- 
monly to be found either in woods or on 
heaths ; it's leaves foon curl up, after the 
plant is gathered ; feldom more than two 
peduncles arife from one item, generally only 
one ; they are both longer than the ftem 5 
upright, and of a reddifli colour. 
Mr. Curtis has given a beautiful fpecimen 
of a mofs, which he has thought proper to 
place under the bry um genus, although ar- 
ranged as a mnium by Linneus. On the firfl; 
view it is diftinguimable from the bry'urn 
undulatum; it's bending peduncles, which 
have occalioned it to be called the fwan's- 
neck bry'um, are an obvious character in this 
fpecies ; added to this> is the ftar-like appear- 
ance, 
