514 LICHENACEI. [THELOTREMA. 
p. 45.—Lichen lepadinus Ach. Prodr. (1798) p. 30. Lichen in- 
clusus Eng. Bot. t. 678.—Brit. Ews.: Leight. n. 121; Mudd, 
n. 268. 
0) 
DD 
ON 
na) 
a 
Hs 
{a} Is} 
a 
ae 
la] 
ian 
modi 
Gi 
so 
a) 
(als 
Lela 
“D0! 
0 
iy 0! 
Be 
SS} X.250 
SOONOOVCOCOTES 
Fig. 73. 
Thelotrema lepadinum Ach.—A. Section of apothecium, x30. B, Theca and 
paraphyses, X250. OC, Two spores, x 350. 
The thallus varies somewhat in thickness, and at times, especially 
when growing on holly, is determinate and marked by a narrow, black, 
hypothalline line. In a young state the apothecia might be taken for 
those of a Pertusaria, but when fully developed they are very different 
in appearance.” They are usually more or less scattered, but occasionally 
in old plants become crowded. 
Hab, On smooth bark of trees from maritime to upland tracts. —Distr. 
General and common in England; rarer in Scotland; apparently very 
rare in Ireland.—B. M.: Ugley and Walthamstow, Essex ; Ightham, 
Kent; St. Leonard’s Forest, Sussex ; New Forest, Hants; Ilsham Walk, 
Torquay, 8S. Devon; St. Breock, Cornwall; Bagley Wood, Berks; 
Bardon Hill, Leicestershire ; Hollybush Hill, Malvern, Worcestershire ; 
Cwm Bychan and Barmouth, Merionethshire; Hafod, Cardiganshire; 
Haughmond Hill, Church Stretton, and Acton Burnel Hill, Shropshire ; 
Baysdale, Cleveland, Yorkshire; Teesdale, Durham; Calder Abbey, 
Cumberland; Felton Woods, Northumberland. Foot of Ben Lomond, 
Dumbartonshire; Barcaldine and Appin, Argyleshire; Glen Falloch and 
Loch Katrine, Perthshire; Morrone, Braemar, Aberdeenshire. River- 
stone, co. Cork ; Killarney, co. Kerry. 
Var. 6. scutelliforme Ach. Lich. Univ. (1810) p. 312; Syn. 
p. 115.—Thallus effuse, thickish, unequal, at times subpulverulent, 
cream-coloured. Apothecia prominent, somewhat large, crowded, 
