258 THE JOURNAL OF BOTANY 
tree-trunk at Chaigley. Perhaps overlooked elsewhere for Platysma 
glauca, which it closely resembles in habit and chemical reaction.— 
P. laevigata Ach. 2. Wood below Whitewell.—P. sawatilis Ach. 1. 
Greygarth Fell. 2. Great Clough; Lower Emmetts; Wolfhole 
Crag; Mallowdale Fell; Dolphinholme; and near Garstang.— 
f. en Schaer 2. Lo ong Crag; Mallowdale Fell, and near 
ii. P; eiilcalte Tayl. 1. Ea segill, Silverdale, and Heys- 
— ? Chaigley and Clougha. 8. Near Garstang. — Var. levis 
Nyl.? Tree near Heysham Moss. Resembles a cuell form of 
F. sulcata without soredia,.—P. orphislosdee a 1 & 2. Frequent 
on rocks and walls.—Var. panniformis Nyl. . 2. Clougha and Great 
Clough of Tarnbrook Fell, on millstone- -grit ‘rocks. — P. Borreri 
urn. . 1. Below Kirkby ‘Lonsdale and near Aughton, on; tree- 
trunks. 2. Middlegill, Hindburn.—P. caperata Ach. 1. Very fine 
in the east of this district, becoming rarer and smaller towards the 
coast.. 2. Between Ca aes nd Halton, and Damas Gill, sparingly.— 
DP. conspersa ‘Adli he ilurian rocks, slang. and on Silurian 
boulders in walls near Gowen Bridge. 2.:Millstone-grit rocks in 
Damas Gill. — P. ewxasperata Nyl. 1. On trees, sparing y, near 
eH Aughton, and Over Kellet. 2. Near Clougha and Dol- 
phinholme. — P. subaurifera Nyl. 1. Near Kirkby Lonsdale. 2. 
cry Woon —P. fuliginosa Nyl. .1. Walls near Ireby, Burrow, 
an 2. Frequent ne grit rocks and walls in the fell districts. 
— mae virens Ny Trees near. Wen below 
Kirkby Lonsdale ; Lower Fase ; ton Crag; Heysham Moss. 
+a, ag 
—P. tristis Nyl. 2. Hell Crag and Long Crag. — P. pliysodes a 
1. Greygarth Fell. 2. Tarnbrook Fell; near rWhitewell Kemp 
End.—f, platyphylla. 1&2. Occasional. ir labrosa Ach. Distr iets 
1, 2, 8. Very common.—f. tubuiosa Mudd. 3. Lytham. 
Stictei. None of this section have yet been noticed. 
Peltidea aphthosa Ach. ? Silverdale. 2, Middlegill, Hindburn. 
Solorina saccata Ach. 1. Near Easegill Kirk; Dalton Crag; 
near Henridden; several localities about Silverdale. 
Peltigera canina Hoff. 1&2. Frequent.—P. rufescens Hoff. 1. 
Upper Hasegill. 2. Spreet Clough = Deer Clough.—P. poly- 
dactyla Hoff. 2. — Lower Salter.— P. horizontalis Hoff. 1. 
Near Henridden. erie Fell Gully, and Gorge of the 
Hodder below White tewell 
Physcia parietina De N ot. Common on walls and roofs, rare on 
trees. We have noticed that this plant grows luxuriantly near 
cow-byres, and about gateways into pastures. Long distances of 
wall-bordered roads may be traversed without seeing the plant, but 
as soon as a cow-byre is reached it appears in abundance about the 
walls and buildings. Its predilection for. such localities can hardly 
be due to the spores being carried by the cow’s hair, and then 
other parts out of reach. The ammoniacal exhalations in such 
situations “pphond supply some plant-food on which. this species 
ives. —f. cinerascens Leight. 1. Near Over Kellet.— P. lychnea 
Nyk 2. Near: ‘Whitewell. —-P..ciliaris DC... Apparently very rare. 
