254 LICTTEXACET. [PARMELIV. 



Hab. On rocks and boulders in maritime and upland districts. — Disfr. 

 Local in S. and \V. Enu-laud, X. Wales, Central Scotland, S. Ireland, and 

 the Channel Islands. — B. ^I. : La Move, Island of Jersey. Near Shank- 

 lin, Isle of Wiu^ht ; Wembury, Devonshire ; near Penzance, Cornwall ; 

 Barmouth, Merionethshire ; Island of Anglesea ; Isle of Man; Stavelv, 

 Westmoreland. Loch Creran, Argyleshire; Iving's Park, Stirling. 

 Mizen Head, co. Cork. 



ft. isidiascens N^yl. Flora, 1875, p. 8. — Thallus more or less 

 sprinkled with olive-brown verruccEform isidia, which become whitish- 

 sorediate at the apices; otherwise as in the type. — Cromb. Grevillea, 

 X. p. 25. — Brit. Kr.s. : Leight. n. 291 pro parte ; Bohl. n. 10!J pro 

 parte. 



Well characterized by the often crowded and at length thicki^h isidia, 

 which sometimes nearly cover the thallus, and give it an almost panni- 

 form appearance. It is rarely seen fertile, the apothecia being but few, 

 with the margin sometimes rugose with isidia. 



Huh. On rocks and boulders in maritime and upland districts. — Distr. 

 Local and scarce in the Channel Islands, S. England, N. Wales, and 

 Central Scotland. — B. M. : Chateau Point, Island of Sark. Near Pen- 

 zance aud Helminton, Cornwall; B unuouth, Merionethshire ; Island of 

 Anglesea ; Isle of Man. King's Park, Stirling. 



25. P. fuliginosa Xyl. Flora, 1868, p. 346.— Thallus orbicular or 

 suborbiciilar, membranaceous, ap]u"essed, laciniato-lobcd, nmbrine- 

 badious or olive-black, fuliginoso-furfuraceous or black-isidiose, be- 

 neath blackish, sparingly fibrillose ; lobes plane, crenate (K~? 

 CaCl~ n). Apothecia small or moderate, scattered, pale- or dark- 

 brown, the margin thickish, slightly cremtlate ; spores 0,000-1 :i mm. 

 long, 0,005-6 mm. thick. — Cromb. Lich. Brit. p. 36; Leight. Lich. 

 Fl. p. 134, ed. 3, p. 123. — Farmelia olivacea yat. faligmoaa Fr. in 

 Dub. Bot, Gall. (1830) p. 602. Parmelia olivacea y. furfuracea 

 Schser., Mudd, Man. p. 100. Lichenoides olivaceum, scutellis Icevibus 

 DiU. Muse. 182, f. 77 b. 



Eeadily recognized by the peculiar black, setuloso-papillose isidia, 

 which are sometimes so dense as to cover the whole thallus and obliterate 

 the lobes, except at the immediate circumference ; otherwise sufficiently 

 .separated from the preceding species by the chemical reaction of the 

 medulla with CaCl. The apothecia are rare in this country, especially on 

 saxicole specimens, and the spermogones are verj' rarely visible. 



Hah. On rocks and walls, also on old pales, rarely on trees, in maritime 

 and upland districts. — Di^tr. Probably general, though not common, in 

 the mountainous regions of Great Britain and Ireland. — B. ^I. : Penzance 

 and near St. Breock, Cornwall; Herefordshire Beacon, Malvern, ^^'orces- 

 tershire ; Borthwyuog, near Dolgelly aud Rhewgreidden, Merionetl)shire; 

 Bettws-y-Coed, Denlnirhshire ; Haughmond Hill and Stiperstones, Shrop- 

 shire ; near Ayton, Yorkshire ; Stavelv, Kendal, Westmor.4and. New 

 Galloway, Kirkcudbrightshire; Gleu Lochay and Blair Atlnilc, Perth- 

 shire; Glen Shee, Forfiirshire ; Portlethen and Uurris, Kincardineshire ; 

 Hill of Ardo, near Aberdeen, and Castleton of Braemar, Aberdeenshire ; 

 near Abernethy, Elgin. Near Cork ; UawM-os River, Connemara, co. 

 Galwav. 



