— 
132 CYCLOCARPINEE [PARMELIA 
Apothecia rare, subpedicellate, reddish-brown, the outer wall 
rugose, areolate and isidiose; margins incurved, crenate and- 
often becoming sorediate ; spores ellipsoid, 23-33 p long, 15-17 p 
thick (fide Hue) with a thick epispore.—P. perlata var. ciliata 
Cromb. Lich. Brit. p. 33 (1870) (non Scher.). P. pilosella Hue 
in Journ. Bot. Fr. xii. p. 247 (1898). Lichen perforatus Sm. 
Engl. Bot. t. 2423 (1812) (excl. mid. fig.). 
Ezsicc. Cromb. n. 30; Johns. n. 68; Larb. Cesar. n. 17 & 
Lich. Hb. n. 86; Leight. n. 112. 
The absence of marginal soralia, the superficial cilia, and the large 
spores distinguish the species from P. perlata var. ciliata. Some- 
times the sorediose isidia form scab-like excrescences (P. ptlosella 
f. excrescens Arn. ex Hue tom. cit. p. 249). Apothecia are rare; the 
spores in a specimen from Anglesea were smaller than the recorded 
size, measuring from 20 p» in length. 
Hab. On trees, rocks and boulders in shady situations.—Distr. 
General, though not common throughout the British Isles.— 
B. M. Jersey; Guernsey; St. Mary’s Isle, Scilly; near Penzance, 
Cornwall; Lustleigh Cleeve and near Bolt Head, Devon; St. 
Leonards, Sussex; Tunbridge Wells, Kent; Malvern, Worcestershire ; 
Barmouth and Dolgelly, Merioneth; Anglesea; near Kendal, West- 
moreland; Keswick, Cumberland; New Galloway, Kirkcudbright- 
shire; Barcaldine, Argyll; the Trossachs and near Loch Tay, 
Perthshire; S. of Fort William, Invernessshire; Applecross, Ross- 
shire; Dunkerron, Denis and Derrycunihy, Kerry; Killery Bay, 
Connemara, Galway; Clare Island, Mayo. 
18. P. saxatilis Ach. Meth. Lich. p. 204 (1803).—Thallus 
thin, spreading or suborbicular, laciniate-lobate with reticulate 
lines or markings, or even reticulate-lacunose, frequently more or 
less isidose, greyish white or glaucous-grey, the lobes generally 
rather narrow, sinuous, crenate and truncate or retuse at the 
apices ; beneath black, rhizinose to the margin (KT3a¢¥ hn rea. 
CaCl.-). Apothecia moderate in size or rather large, the 
excipulum and margin thin, crenulate or often isidiose, the disc 
reddish-brown ; spores ellipsoid, 14—18 p long, 7-9 y» thick, with 
an epispore 1-1°5 p» thick—S. F. Gray Nat. Arr. i. p. 440; 
Hook. FI. Scot. ii. p. 53 & in Sm. Engl. Fl. v. p. 199; Tayl. in 
Mackay Fl. Hib. ii. p. 144; Mudd Man. p. 94 (excel. vars. 
leucochroa and omphalodes) ; Cromb. Lich. Brit. p. 34 (exel. vars. 
suleata and omphalodes); Leight. Lich. Fl. p. 137 (exel. vars. 
suleata and omphalodes, incl. var. panniformis); ed. 3, p. 126. 
Lichenoides crusta foliosa, superne cinereo-glauca, inferne nigra et 
cirrosa, scutellis nigricantibus Dill. in Ray Syn. ed. 3, p. 72, n. 61 
(1724). Lichenoides vulgatissimum cinereo-glaucum lacunosum et 
cirrosum Dill. Hist. Muse. p. 188, t. 24, f. 83.4 (1741). Lichen 
saxatilis L. Sp. Pl. p. 1142 (1753); Huds. Fl. Angl. p. 446 ; 
Lightf. Fl. Scot. ii. p. 816; With. Arr. ed. 3, iv. p. 33; Engl. 
Bot. t. 603. 
Ezsice. Cromb. n. 27 ; Leight. n. 203 pro parte. 
