134 CYCLOCARPINE [PARMELIA 
greyish or glaucous white and more or less marked with reticulate . 
lines, the reticulations frequently changing to furrowed oblong 
ov linear white-margined soralia; beneath blackish, rhizinose 
(Ktycllowish ss xea, CaCl-). Apothecia and spores as in P. sawatilis, 
or rather smaller.—Cromb. in Grevillea xv. p. 75 (1887). 
P. saxatilis var. leucochroa Wallr. Fl. Crypt. Germ. i. p. 499 
(1831); Mudd Man. p. 94; var. suleata Cromb. Lich. Brit. p. 34 ; 
Leight. Lich. Fl. p. 138 ; ed. 3, p. 126. Lichenoides vulgatissimum 
cinereo-glaucum, lacunosum et cirrosum Dill. Hist. Muse. p. 188, 
t. 24, fig. 83 B (1741). 
Exsice. Cromb. n. 28; Dicks. Hort. Sice. fase. xiv. n. 22; 
Johns. n. 69; Leight. n. 203 ; Mudd n. 66. 
Distinguished from the preceding by the absence of isidia and by 
the furrowed soralia which are often abundant on the thallus and 
along the margins of the lobes, giving the whole plant a rough 
scabrous appearance. 
Hab. On trees and old walls in maritime and inland districts.— 
Distr. General and common throughout the British Isles; fertile 
chiefly in the Highlands of Scotland.—B. M. Guernsey; Penzance 
and Withiel, Cornwall; Beeding and. Newtimber, Sussex; New 
Forest, Hants; near Cirencester and Sapperton, Gloucestershire ; 
near Malden, Epping and Hainault Forests, Essex; Harboro’ Magna, 
Warwickshire; Aberdovey, Merioneth; Ludlow, Shropshire; Haddon 
Hall and Darley, Derbyshire; Ayton and Ingleby, Cleveland, York- 
shire; near Hexham, Northumberland; Dalry, Kirkeudbrightshire ; 
Dreghorn and Craiglockart, near Edinburgh; Barcaldine, Argyll; 
Loch Katrine and Killin, Perthshire; Baldovan, Forfarshire; near 
Braemar and Den of Murtle, Aberdeenshire; near Fort William, 
Invernessshire ; Applecross, Rossshire ; Rostellan, Cork; Dunkerron, 
Kerry ; Clare Island and Achill Island, Mayo. 
20. P. dubia Scher. Enum. Lich. p? 45 (1850).—Thallus 
suborbicular, thinnish in texture, appressed, lobate, smooth or 
slightly wrinkled, glaucous-grey or pale-whitish-grey, the surface 
more or less thickly sprinkled with small round soralia, the lobes 
rather broad, rounded, sinuate, the edges frequently sorediate ; 
beneath almost black, wrinkled, sparingly rhizinose (K+ 7" 
CaCl;red, soredia CaCl + red). Apothecia moderate in size or 
larger, brownish-red, the margin elevated, inflexed; spores 
11-15 p long, 8-11 p thick.—P. Borreri Turn. in Trans. Linn. 
Soc. ix. p. 148, t. 13, fig. 2 (1808); S. F. Gray Nat. Arr. i. 
p. 437; Hook. in Sm. Engl. Fl. v. p. 199; Tayl. in Mackay FI. 
Hib. ii. p. 146; Mudd Man. p. 94, t. 2, fig. 29; Cromb. Lich. 
3rit. p. 34; Leight. Lich. Fl. p. 133; ed.3,p.122. P. reddenda 
Stirton in Scott. Nat. iv. p. 298 (1878); Leight. Lich. Fl. ed. 3, 
p. 119; Cromb. in Grevillea x. p. 26 (1881).  Lichenoides 
glaucum perlatum, subtus nigrum et cirrosum Dill, Hist. Muse. 
p. 147, t. 20, fig. 39 (1741). Lichen dubius Wulf. in Jacq. 
Collect. Bot. iv. p. 275, t. 19, fig. 1 (1790). ZL. Borreri Turn. in 
Sm. Engl. Bot. t. 1780 (1807). 
