78 MR. W. WEST: ECOLOGICAL NOTES. 
Pertusaria faginea, and Cladonia fimbriata (5), Parmelia physodes (2), 
P. saxatilis, mostly in upper part (5), P. perlata (5), P. fuliginosa var. 
letevirens, P. caperata, Weissia ulophylla, Orthotrichum Lyellii (5), the rest 
sub-bareness. Some other Ashes had a greater proportion of Séereodon 
cupressiformis, with absence of some of the other species, such as Parmelia 
perlata, Stictina fuliginosa, &e. 
Five lots of Acer. 
| | 
1 | 2 3 4. 5 
Name of epiphyte. | >~ v — | 
130 cms. | From 45 to 60 centimetres | 
in diam. | in diameter. 
| Mostly near, Father Exposed 
Stereodon cupressiformis, var. fili- | the base. | exposed. mostly below 
formis... ses ... 20 | 25 ... 5 
Mostly 
| at base. 
Isothecium myosuroides .................- m e | 5 | | 
| 
Frullania dilatata.................. ees 2 3 20 A little. | 2 | 
Metzgeria furcata ллы 60 - | 2 
Lecidea parasema „ое À little. m | A little. 24 2 
Pertusaria communis п... 2 e | m ves 2 | 
Parmelia perlata. ss. e 2 A little. | A little. | A little. | 
Lecanora subfusca...... eee eene ... A little. A little. 10 2 
About About About About About 
Sub-bareness ............................. 35 | 75 45 60 45 
Other species in smaller quantities among the above were :— Weissia 
ulophylla, Stereodon resupinatus, Trentepohlia aurea, Lobaria pulmonaria, 
Parmelia caperata, P. physodes, Usnea ceratina, Graphis seripta, and Lvernia 
Prunastri. 
Average approximate percentages of the chief epiphytes on the above :— 
Stereodon cupressiformis 10, Metzgeria furcata 12, Lecidea parasema 5, 
Frullania dilatata 5. 
A number of Hollies from 30 to 35 centimetres in diameter showed :— 
Stereodon cupressiformis var. (10), Parmelia fuliginosa var. letevirens (5), 
P. caperata (2), Graphis elegans and G. scripta, with the varieties stellata 
and pulverulenta of the latter (3), sub-bareness the rest. 
The average of a number of Alders examined showed the following. The 
windward side bore fully a third more epiphytes than the leeward one, 
a mixed association of Stereodon cupressiformis, Parmelia perlata, with 
smaller quantities of Usnea ceratina, Evernia Prunastri, and Trentepohlia ; 
sub-bareness held sway over two-thirds of the area. 
