LECANORA.] LrCANO-LECrDKKT. 4f'il 



155. L. parella Ach. Lich. Univ. (1810) p. 370 pro parte ; Nvl. 

 Not. 8allsk. pro F. et Y\. Yonn. I'orh. u. ser. v. (180*5) p. 1:55. — 

 Thallus subdutcrminato or effuse, thickish, granulato-rugose, verni- 

 cosn-granulate or rimoso-diffract, whitish or grej-ish-white (K — , 

 CaCl— ); hypothallus white, usually little visible. Apothecia 

 moderate, concave, then plane, at length more or less convex, rugose 

 or verrucose, pale, naked or white-pruinose (epithecium K(CaCl) 

 -f reddish), the thallino margin thick, entire (K(CaCl) — ) : spores 

 6-8na3 (rarely 2na3), ellipsoid or subglobulose, 0,048-88 mm. long, 

 0,025-46 mm. thick. — Cromb. Grevillea, xviii. p. 70 ; 8m. Eng. Fl. 

 V. p. 191 ; Tayl. in Mack, Fl. Hib. ii. p. 137 ; Hook. Fl. Scot. ii. 

 p. 48 ; Cromb. Lich. Brit. p. 54 pro parte; Leight. Lich. Fl. p. 188 

 pro parte, ed. 3, p. 2Ul pro parte. — L. pallescens a. 2)areUa Mudd, 

 Man. p. 155. Rinodina i)arella Gray, Nat. Arr. i. p. 453. Lichen 

 pareUus Linn. Mant. (1707) p. 132; Huds. Fl. Angl. ed. 2, p. 530 ; 

 Lightf. Fl. Scot. ii. p. 814 ; With. Arr. ed. 3, iv. p. 17 ; Eng. Bot. 

 t. 727. Lichenoides leprosum tinctoriian, scuielhs lapidam cancri 

 fiqura Dill. Muse. 130, t. xviii. f. 10. Pertusaria incarnata Leight. 

 Lich. Fl. ed. 3, p. 235 (cfr. Nyl. Flora, 1883, p. 534).— /?/-i<. Exs. : 

 Leight. n. 8 ; Mudd, n. 125 ; Dicks. Hort. Sic. x. n. 23 : Bohl. n. 54 ; 

 Larb. Caesar, n. 75; Lich. Hb. u. 300; Cromb. n. 1G6. 



The Perelle d' Auverrjne of S. France, so that, as observed by Sir J. E. 

 Smith, Linnaeus ought to have written the trivial name perellus as in 

 Eng. Bot. &c. The thallus, usually very widely expanded, varies con- 

 siderably in thickness according to luabitat, and when Ugnicolous and 

 corticolous is at times verv scanty. The apothecia are numerous, often 

 crowded and anguloso-diflform, almost obliterating the thallus ; they are 

 at first depresso-globulose and poriform (the disc being scarcely visible) 

 with very tumid thalline margin, a condition which in some situations 

 seems to be permanent (form iwrinoides i^romh.). Lichen tumiduhisFeV!^. 

 L'st. Ann. Hot. xi. (1794) p. 181, with shields crowded, tumid, the 

 margin thickish {nnn Ach. Lich. Univ. p. 371), is only a corticolous (also 

 saxicolous) condition (var. tumidula Cromb. Lich. Brit. p. 54 ; Leight. 

 Lich. Fl. p. 189, ed. 3, p. 202), not to be distinguished even as a form. 



Hah. On rocks, walls, and trunks of trees, rarely on old pales, from 

 maritime to subalpine tracts. — Distr. General and common in Great 

 Britain and the Channel Lslands; no doubt also in Ireland. — B. M. : 

 Boulay Bay, Island of Jer-ey ; Chateau Point, Island of Sark. Greenwich 

 Park and near Tunbridge Wells, Kent ; Ardingly Rocks, Peasemarsb, 

 and near Hastings, Sussex. ; Penzance, Duloc, and St. Issey, Cornwall ; 

 near Tenby, Pembrokeshire ; Barmouth, Merionethshire ; Llandys-il, 

 Cardiganshire ; Nant Fraucon, CarDarvon.shire ; Bardon Hill, Leicester- 

 shire: near Shrewsbury, Shropshire; Ayton, Cleveland, Yorkshire; 

 Eglestone, Durham ; St. Bees and Bassenthwaite, Cumberland ; Choller- 

 ford, Northumberland. Arthur's Seat and Meadowbank Woods, Edin- 

 burgh ; AVest Water, Fifeshire ; Barcaldine and Ballachulish, Argyle- 

 shire ; Sidlaw Hills and Baldovan, Forfarshire ; Ben Lawers, Aberfeldy, 

 and Craig Tulloch, Blair Athole, Perthshire; Portlethen and Cove, Kin- 

 cardineshire ; Morrone, Glen Callater, and Glen Dee, Braemar, Aberdeen- 

 shire ; Glen Nevis, Lochaber, Inverness-shire ; Applecross, Ross-shire. 

 Annemount near Cork, and Kilbrittain near Bandon, co. Cork ; Killarney, 

 CO. Kerrv. 



