192 
growing “on logs of wood and the trunks of coniferous trees, espe- 
cially larches, in elevated situations, from Italy to Sweden, and from 
the Pyrenees to Tyrol.” Our British species of the genus Evernia, 
as defined by Fries, range themselves under two groups. The first of 
these, to which the plant under notice belongs, is characterized by a 
fruticulose thallus, and is made up of species placed under Alectoria 
and Cornicularia by Acharius. It is also represented in our Flora by 
two widely distributed and variable species, E. jubata and E. ochro- 
leuca, from both of which E. vulpina differs greatly in habit and 
appearance, and may be readily distinguished by the characters given 
above. In fact, it seems more analogous to E. flavicans (Borrera, 
Ach.), which may be regarded as a sort of connecting link between the 
fruticulose and foliaceous groups than to either of them; but even to 
this species it bears only a distant resemblance. There appear to be 
two principal forms of variation: the first with an elongated filamen- 
tose thallus, light yellow in colour and nearly smooth ; the other with 
a shrubby and somewhat stunted thallus, covered with granular, yel- 
lowish or sublivid, distinct or aggregated soredia. The specimens 
which I have seen from Sweden (coll. Swartz) and Switzerland 
(Scherer) belong to the latter variety (the original plant of Linnzus), 
which is much more widely distributed than the other, but is never 
found in a fertile state. The Irish and English specimens belong to 
the filamentose form, but they are also barren. Indeed, Scherer 
states the apothecia are only found very rarely. I have also had a 
Worcestershire locality reported, which Mr. Lees has kindly under- 
taken to investigate. 
2. Evernia divaricata (L. divaricatus, Z.)— “Thallus glaucous, 
glabrous, lacunose, rough, concolorous; segments involute, filiform, 
pendulous, branched in a divaricate manner, afterwards cracking 
round. Apothecia lateral; disk brownish; border thin, entire.”— 
Scher. Enum. p. 12. 
Lichen divaricatus, Linn. Syst. Nat. 713; Ach. Prod. p. 226. 
Parmelia, Ach. Meth. p. 269. Evernia, Ach. Lich. Univ. p. 441; 
Fries, Lich. Eur. p.25; Summa Veg. Scand. i. p. 108. Physcia, 
Scher. Enum. p. 12.  Parmelia mollis, y. divaricata, Scher. Spice. 
491. Usnea flaccida, Hoffm. pl. lich. t. 67, figs. 1,2; DeC. 
Exsic. Moug. and Nest. 545; Fries, Lich. Suec. 332 ; Scheer. 
Lich. Helv. 392. 
Like the preceding, this species is included amongst a series of 
English specimens, without special localities, collected by the Rev. J. 
Harriman, in the Daltonian herbarium. Like the preceding, also, it 
