TttE SECOND PART. xxiii 
difficult to diftinguifti. Hedwig's inveftigations of them; his 
opinion of their parts of Fructification. Fringes from Lichen 
Ciliaris put forth roots ; diftinct from the fuppofed parts of 
Fruciification. Hedwig's plates of the Algae tribe. Algae not 
well underftood. Sea wrack, a Fucus. 193, Prolific property 
of the leaves of Fucus Vesiculofus. Black hair-like tufts found 
growing upon Fiicus, a Conferva. Some fpecies of Fucus., 
perhaps not true vegetables. Sea-anemone falfely efteemed a 
vegetable. Green films on water and on trees not thoroughly 
underftood. Clafs Cryptogamia requires new arrangement. 
J 94, Genera of the third order diftinguifhed by no obvious 
common character ; peculiarities of them worth attending to. 
Beauty of the Lichens. White Mofs, on heaths, Rein-deer 
Lichen ; many varieties of it ; diftin&ion between them and 
the true fpecies. 195, Mofs on trees, a Lichen. Lichens, 
Moffes, Ferns, and Fungufes, form a complete winter garden. 
Fungufes mould be ftudied with good plates. Generality of 
Fungufes not ofTenflve either to the fmell or tafte. Much 
information gained, concerning them, within the laft twenty 
years; not yet perfectly underftood. 196, Hedwig's re- 
searches into the Fungi tribe ; fuppofed, by him, to porTefs 
ftamens and piftils. Curtain of Fungufes, not found in every 
fpecies. Curtain defcribed. Hedwig's account of the fup- 
pofed piftils. 3 97j> Seeds of Fungi. Globules uniformly 
found in the Genera Agaricus and Boletus believed, by Hed- 
wig, to be ftamens. Parts which can be feen only with power- 
ful magnifiers cannot be ufed for the diftinction of Genera* 
198, Excellence of generic characters to be obvious and clear. 
Fungi continue their fpecies by a powder which is vifible in 
the gills of many of them, generally allowed to be feed. Short 
continuance of fome of the Agaric fpecies. Inveftigation of 
an Agaric. Genus Agaricus defcribed. Three firft divifions 
of the Genus founded on the pofition of the ftipes. 199, Dis- 
tinction betwixt the Volve and Curtain, explained by Mr. Bol- 
ton. Erroneous account of the Volve, by Linneus. Under 
the Curtain of Fungi the parts of Fructification found, by 
b 4 Hedwig, 
