96 TRANSACTIONS AND PROCEEDINGS OF THE [Sess. rxrx. 
gracillima ot crenulata. This last was one of the records 
for the county. 
We fully expected to find some of the rare alpine hepatics 
in Canlochan and Corrie Ceannmor, but whether they did 
not exist, or our attention being divided between looking 
for them and flowering plants, especially Gentiana nivalis, 
we may have overlooked them, it is certain we did not get 
a very favourable impression of either locality. At the 
head of Canlochan, on the slopes, the soft clayey soil, which 
in winter will be readily displaced by sliding snow or heavy 
rain, does not afford a sufficiently permanent and stable 
footing to the cryptogamic plants. There is no humus, such 
as there is at the back of Ben Lawers on the rising ground 
above Loch na Chait. In Canlochan, where harder parts of 
the rock have resisted weathering, they project in spurs and 
ledges on the top of which carices and hawkweeds lnxuriate, 
and the sides are so crumbly that mosses and hepatics cannot 
establish themselves. Hepatics need abundance of moisture, 
and for those which affect rock surfaces, a hard yet porous 
quality of rock, which absorbs moisture readily but parts 
with it slowly. There seem to be the extremes of bad con- 
ditions in Canlochan and Ceannmor: in the former soft 
and friable rock; and in the latter hard crystalline, non- 
porous, granitic rock. The records for v.c. 90 consisted of 
Gymnomitrium varians (Lindb.) (formerly Acolea conferta), 
Gymnomitrium crenulatum, Harpanthus Flotowianus, Seapania 
uliginosa, and Lophozia alpestris, var. gelida. Gymnomitrium 
varians was found as very small black tufts on stones. Har- 
panthus was very common in its usual habitat by the side of 
running water. Pallavicinia Blythi (Morck.) was in fine 
fruit on a bank near the Glen, and much stronger than speci- 
mens from various localities in the Killin district. Anthelia 
Juratzkana, Bazzania triangularis, aud Radula Lindbergii 
were all scarce, whereas in West Perthshire they are often 
met with. We searched for hours for a hepatic which was 
first found by Mr. Macvicar a year or two ago on Ben Lawers, 
and since then in several localities in West Perthshire. I 
had the pleasure of finding it on Ben Laiogh two years ago, 
so I knew what to look for. It grows as isolated stems in 
wet grassy ground by the side of streamlets above 3000 it. 
If we failed to find Sphenolobus politus we found another 
