232 NOTES ON THE LICHENS IN SOWERBY'S HERBARIUM. 
ferous states of var. plicata. The short crowded papilla, by which this 
form is characterized, are generally supposed to be rudimentary ranches, 
but, as would appear, they scarcely ever become brauches proper, in con- 
sequence of their development being previously arrested, in which case in 
old plants they are often dissolved into soredia. 
nigricans, Ach., stated to have been received from Mr. Harriman, but 
without either name or locality. Leighton, in his ‘Lich. Fl. p. 87, quotes 
for A. ochroleuca, ‘ Teesdale, Harriman,’ where this truly Arctic or alt- 
characters, a very easy way of distinguishing these two somewhat closely 
Fl.’ True sarmentosa, 
Ach., occurs in Dickson's Herbarium, but without any locality assigne 
so that in the absence of any record of its having even been gathered in 
Scotland, we are not justified in regarding it as a British species. At 
e smaller figure, which represents a speci- 
men gathered on Ben Luighal, Sutherlandshire, is not referable to — 
^a. Of this it may be regarded as a “ smaller, € 
: y 
Braemar, and improperly assigned tof. crinalis, Frs. On the plant ™ 
herb. Sowerby, a single small krohen appears as figured in B., 
which is lateral and not pseudo-terminal as in the normal form. 
