PARMELIA. ] PARMELLEL. 245. 
Bot. dc. it evidently originates from the nodular excrescences on the 
thallus of the preceding form becoming detached. 
Hab, On the ground in alpine situations—Distr. Found only on one 
of the N. Grampians, Scotland.—B. M.: Morrone, Braemar, Aberdeen- 
shire. 
q 
13. P. Borreri Turn. Trans. Linn. Soc. ix. (1808) p. 148, t. 13. 
p. 2.—Thallus suborbicular, cartilagineo-membranaceous, appressed, 
imbricato-lobed, rugoso-sorediate, glaucous-grey or pale whitish- 
grey; beneath brownish or pale, subfibrillose, glabrous at the cir- 
cumference ; lobes broad, rounded, sinuate, the soredia white-punc- 
tiform  (K TIM, CaCl? ..q, soredia CaUl+red). Apothecia 
large, badio-reddish, the margin elevated, inflexed; spores 0,011- 
15 mm. long, 0,008-11 mm. thick.—Sm. Eng. Fl. v. p. 199; Tayl. 
in Mack. Fl. Hib. ii. p. 147; Mudd, Man. p. 94, t. ii. f.29; Cromb. 
Lich. Brit. p. 84; Leight. Lich. Fl. p. 183, ed. 3, p. 122.—Lichen 
Borrert Eng. Bot. t. 1780. Lichenoides glaucum perlatum, subtus 
nigrum et cirrosum Dill. Muse. 147, t. 26. £ 39c¢. Parmelia red- 
denda Stirt. in Scottish Naturalist, 1878, p. 298; Leight. Lich. Fl. 
ed. 3, p. 199, is an accidental state, in which the medulla (not the 
soredia) gives no reaction with CaCl (cfr. Cromb. Grevillea, 1881, 
p. 26). Brit. Exvs.: Leight. n. 231; Larb. Cesar. n. 20. 
Similar to P. sulcata, from which it is distinguished by the thicker, 
more rigid, smoother, less imbricate, appressed, differently coloured 
thallus, and by the form of the soredia. These appear as numerous, ir- 
regularly scattered, often impressed and pseudo-cyphelloid, whitish 
punctate verruce, giving it a rough aspect. The thalline reactions, the 
smaller spores, and the spermogones render it very distinct. In this 
country the apothecia are rare and chiefly central, becoming irregularly 
erforate in old age. The spermogones have the spermatia lageniform, 
0,0045 mm. long, 0,0010 mm. thick. 
Hab. On trunks of old trees, rarely on rocks, in maritime and upland 
wooded. districts—Distr. General in 8. and W. England; rare in 8. 
Scotland, S. and §.W. Ireland, and the Channel Islands—B. M.: Rozel, 
Island of Jersey ; near Jerbourg, Guernsey. Near Bury, Suttolk ; Wal- 
thamstow, Essex ; Maidstone, Kent ; near Brighton and FHenfield, Sussex ; 
Ryde and Shanklin, Isle of Wight; Basingstoke and Lyndhurst, Hamp- 
shire; near Penzance and Withiel, Cornwall; Kemble, Gloucestershire ; 
near Oxford and Charlton Camp, Oxfordshire; Hindlip and Malvern, 
Worcestershire ; Twycross, Leicestershire; Harboro’ Magna, Warwick- 
shire; Barmouth and Dolgelly, Merionethshire ; Dynevor Castle, Car- 
marthenshire; near Kendal, Westmoreland. Near Dumfries; New 
Galloway, Kirkcudbrightshire. Riverston, co. Cork; near Limerick ; 
Dunkerron, co. Kerry. 
b. Ochroleuce.—Thallus normally yellowish green, or pale 
straw-coloured. 
14. P. caperata Ach. Meth. (1803) p. 216.—Thallus expanded, 
imbricato-lobed, rugulose, pale yellowish-green or ochroleucous ; 
