GYRornoRA.] arROPnoREi. 327 



brmtn of the t^'pe. It somewliat resembles G. arctica, but at once dilFura 

 in the smaller and thinner thallus. The apothecia are numeruus, though 

 sm.all, in our specimens. 



JIah. On granite rocks in alpine situations. — Disfr. Very local and 

 rare anion^^ tlie N. (Iranipians, Scotland. — B. M. : Head of Glen Callater 

 and 13en-naboord, IJraemar, Aberdeenshire. 



3. G. cylindrica Ach. :N[eth. (1803) p. 107.— Thallus raonophyl- 

 lous or polypbyllous, moderate or somewhat small, thickish, smooth, 

 sinuato-lobed, greyish or greyish-brown, usually groyish-pruinose, 

 black-fibrillose at tho margins ; beneath pale, here and there blackish, 



moreorless fibrillose (medulla K — ,CaCl~). Apothecia at first sessile, 



plane, then pedicellate, and at length subglobose, gyroso-plicate, 

 thinly margined ; spores 0,010-14 mm, long, 0,006-8 mm. thick. — 

 Gray, Xat. Arr. i. p. 477; Hook. Fl. Scot. ii. p. 42 ; Sni. Eng. Fl. 

 V. p. 218; Tayl. in ^lack. Fl. Hib. ii. p. 155 ; Mudd, Man. p. 119. 

 — Umhilicaria ci/Undrica Cromb. Lich. Brit. p. 40 ; Leight. Lich. 

 Fl. p. IGl, cd. 3, p. 148, Lich'n cylindrieus Ach. Prodr. (1798) 

 p. 148. Gyrophora prohoscidea Turn, & Borr. Lich. Br. p. 219. 

 Umhilicaria varia i. prohoscidea Leight. Ann. Mag. J^at. Hist. ser. 2, 

 xviii. p. 291. Lichen prohoscideus Huds. Fl. Angl. ed. 2, p. 551 ; 

 Eng. Bot. t. 522 (two upper figs.) ; With. Arr. ed. 3, iv. p. 65. 

 Lichen crinitus Lightf. Fl. Scot. ii. p. 360. Lichenoides corneum, 

 marginih'us eler/anter fimhriatis Dill. Muse. 218, t. 29. f. 116 A. — 

 Brit. Exs. : Leight. n. 95 ; Mudd, n. 88. 



"Well distinguished from the preceding by the thallus being smooth, 

 paler beneath and ciliate at the margins, as also by the absence of any 

 medullary reaction. It is commonly monophyllous but often also poly- 

 pbyllous, very unequally lobed, naked or sometimes covered witli a 

 csesious pruina. In other respects it is a rather variable plant, giving 

 rise to the forms and varieties that follow. The apothecia are usually 

 numerous, as are also the spermogones, especially in otherwise sterile 

 specimens. 



Hub. On rocks and boulders from upland to alpine situations. — Distr. 

 Hather local in the mountainous tracts of W. and N. England and N. 

 Wales ; general and plentiful among the Grampians, Scotland ; local in 

 W. Ireland. — B. M. : Dartmoor, Devonshire ; Dol^elly and Cwm Bychan, 

 Merionethshire ; Glyder Vawr, Carnarvonshire ; Cronkley Scarr, 

 Yorkshire ; Teesdale, Durham. I3en Lawers and near Aberfeldy, Perth- 

 shire ; Clova, Forfarshire ; Ben-naboord, Morrone, and near Invercauld, 

 Bi-aemar, Aberdeenshire ; Ben Nevis, Inverness-shire. Mangerton and 

 Brandon Mts., co. Kerry ; Connavalla, co. Cork. 



Form 1. denticulata Ach. Meth. (1803) p. 107.— Thallus with 

 the margins lacero-laciniate, coarsel}- fringed and denticulate ; other- 

 wise as in the type. — Mudd, Man. p. 119. — UmhiVuaria cyUndrica 

 var. denticulata Leight. Lich. Fl. p. 162, ed. 3, p. 149. Umhilicaria 

 varia i. jyrohoscidea b. denticidata Leight. Ann. Mag. Nat. Hist, 

 ser. 2, xviii. p. 293. Gyrojiliora ptrohoscidea p. denticulata Turn. & 

 Borr. Lich. Br. p. 219. Lichen prohoscideus Eng. Bot. t. 522 (two 

 lower fiffs.). Lichenoides corncum, maryiaihus cleyanter Jimbriatis 

 Dill. Muse. 218, t. 29. f. 116 b. 



